Buffs are often situational.  It is important for the buffer to balance the need for buffs with the mana they have to use for them.  Many buffs are helpful, but not necessary and the buffer must weigh the situation to choose what keeps the party functioning smoothly.  PvE and PvP often have different requirements and a good buffer will buff based on what opponents they are facing.
 
Remember Dances and Songs are short duration and consume more MP with each successive Song and/or Dance.

Name Description Who can use it Class
Acumen Temporarily increases Casting Spd. All casters, this includes Orc Casters (Same as Chant of Flame and Wisdom of Paagrio) Clerics get Acumen 2 so Bishop has it; Prophet gets increased levels
Advanced Block Temporarily increases shield defense rate. Anyone with a Shield who might be taking hits. Elven Elder
Agility Temporarily increases Evasion. Dagger users, archers and possibly Tyrants. (Same as Chant of Evasion and Tact of Paagrio) Elven Elder
Beserker Spirit Temporarily reduces P. Def., M. Def. and increases P. Atk., M. Atk., Atk. Spd., Casting Spd., and Speed. Effect 1. Generally anyone who is not tanking or might be tanking. (Same as Rage of Paagrio). Cleric gets level 1 so Bishop has it; Prophet gets higher level
Bless Shield Temporarily increases shield defense rate. Anyone using a shield who might be taking hits. (Same as Shield of Paagrio) Elven Elder, Prophet
Bless the Body Temporarily increases maximum HP. Anyone who might take damage. (Does not stack with Body of Avatar) Prophet
Bless the Soul Temporarily increases maximum MP. Anyone who uses MP. Prophet
Blessing of Paagrio Temporarily increases clan member's defense. Anyone taking hits, but can only be cast on clan and alliance. (Same as Soul Shield, Chant of Shielding and Shield) Shaman get level Blessing of Paagrio level 1 so Warcyer has it; Overlord has higher levels
Body of Avatar For a certain time period, increases ones party members maximum HP and restores the increased portion of their HP. Anyone who might take damage. (Does not stack with Bless the Body) Bishop
Chant of Battle Temporarily increases party member's attack power. Anyone doing physical (not magical) damage. Castable only on party members. (Same as Might and Power of Paagrio) Shaman get Chant of Battle 2 so Overlord has it, Warcryer gets higher levels
Chant of Eagle Temporarily increases ones party members Accuracy. Anyone doing physical damage. Only castable on group members. (Same as Guidance and Sight of Paagrio) Warcryer
Chant of Evasion Temporarily increases party members' Evasion. Dagger users, archers and possibly Tyrants. (Same as Evasion and Tact of Paagrio) Warcryer
Chant of Fire Temporarily increases party member's magic resistance. Anyone who might be taking magical damage. (Same as Glory of Paagrio) Shaman get Chant of Fire level 1 so Overlord has it, Warcryer has higher levels.
Chant of Flame Temporarily increases party member's magic speed. All casters, this includes Orc Casters. Castable only on party members. (Same as Acumen and Wisdom of Paagrio) Shaman get Chant of Flame level 1 so Overlord has it. Warcryer has higher levels.
Chant of Fury Temporarily increases party members' Atk. Spd. Anyone doing physical (not magical) damage. Castable only on party members. (Same as Haste) Warcryer
Chant of Predator Temporarily increases ones party members critical attack rate. Anyone doing physical (not magical) damage. Castable only on party members. (Same as Focus) Warcryer
Chant of Rage Temporarily increases party members' critical attack. Anyone doing physical (not magical) damage. Castable only on party members. (Same as Death Whisper) Warcryer
Chant of Revenge Temporarily reflects damage received by party members back upon the enemy. Excludes damage received from skill or remote attack. Anyone taking physical damage except remote attacks; such as archer. Warcryer
Chant of Shielding Temporarily increases party member's defense. Anyone taking hits, but can only be cast on party members. (Same as Soul Shield, Blessing of Paagrio and Shield) Overlords get Chant of Shielding level 2, Warcryers get higher versions.
Chant of Vampire For a certain time period, allows one's party members to partially restore HP using damage inflicted upon the enemy. Excludes damage from skill or remote attack. Anyone doing physical damage that is not from a remote attack; i.e. will not work for archers. Can only be cast on party members. (Same as Vampiric Rage) Warcryer
Concentration Temporarily lowers the probability of magic being canceled due to damage. All casters, this includes Orc Casters (Shaman, Overlord, Warcryer) Cleric gets Concentration level 2 so Bishop has, Elven Elder, Prophet and Shillien Elder get higher versions.
Dance of Aqua Guard Temporarily increases party members' resistance to attacks by water. Anytime party is taking damage from water spells.  Good against Spellsingers. Bladedancer
Dance of Concentration Temporarily increases party members' Casting Spd., and decreases magic cancel rate. Anytime there is a caster heavy party or no need for other dances. Bladedancer
Dance of Earth Guard Temporarily increases party members' resistance to earth attacks. Anytime party is taking damage from Earth attacks.  (Not sure what qualifies as an earth attack.) Bladedancer
Dance of Fire Temporarily increases party members' critical damage. Anytime there is a melee heavy party. Bladedancer
Dance of Fury Temporarily increases party's Atk. Spd. Anytime there is a melee heavy party. Bladedancer
Dance of Inspiration Temporarily increases party's Accuracy. Archers and melee characters benefit. Bladedancer
Dance of Light Temporarily bestows sacred power to party members' physical attack. Anytime fighting mobs that are weak to sacred. Bladedancer
Dance of Mystic Temporarily increases party members' M. Atk. Anytime there is a caster heavy party or no need for other dances in a party with any damage caster. Bladedancer
Dance of Protection Temporarily bestows one's party members resistance to terrain damage. Anytime party is taking terrain damage.  (Unsure what this actually is other than possibly lava from Valakas' Lair) Bladedancer
Dance of Vampire Partially restores party members' HP by using damage inflicted upon the enemy. Damage inflicted by skill or remote attack is excluded. Anytime there is a melee heavy party. Bladedancer
Dance of Warrior Temporarily increases party members' P. Atk. Anytime party is taking physcial damage. Bladedancer
Death Whisper Temporarily increases critical attack. Anyone doing physical (not magical) damage. (Same as Chant of Rage) Shillien Elder, Prophet
Decrease Weight Makes body lighter. Anyone who might have a weight issue. Elven Elder
Elemental Protection Temporarily increases resistance to fire/water/wind/earth attack. Anyone who might be taking Elemental damage of various types, if only one type better to buff single resists. Hierophant
Empower Temporarily increases M. Atk. All casters, this includes Orc Casters. Also often wanted by any other class that may need to land debuffs or drains, i.e. Bladedancers, Dark Avengers, etc. (Greater Empower is higher version) Shillien Elder
Focus Temporarily increases critical attack rate. Anyone doing physical (not magical) damage. (Same as Chant of Predator) Cleric has Focus level 1 so Bishop has it; Prophet and Shillien Elder get higher levels
Glory of Paagrio Temporarily increases alliance members' M. Def. Anyone who might be taking magical damage. (Same as Chant of Fire) Overlord
Greater Concentration Temporarily lowers the probability of magic being canceled due to damage. All casters, this includes Orc Casters (Shaman, Overlord, Warcryer) Prophet, Shillien Elder, Elven Elder
Greater Empower Temporarily increases M. Atk. All casters, this includes Orc Casters. Also often wanted by any other class that may need to land debuffs or drains, i.e. Bladedancers, Dark Avengers, etc. (Empower is lower version) Shillien Elder
Guidance Temporarily increases Accuracy. Anyone doing physical damage. (Same as Chant of Eagle and Sight of Paagrio) Prophet and Shillien Elder
Holy Weapon Temporary holy enhancement of physical attack. Anyone using physical attacks, though not remote ones, against those weak to sacred attacks. Bishop, Prophet
Kiss of Eva Temporarily increases lung capacity. Anyone traveling or fighting under water Cleric gets level 1 so Bishop has it, Elven Elder, Prophet and Shillien Elder get level 2
Mental Aegis Temporarily increases resistance to Hold, Sleep, Fear, and Silence. Anyone who might be affected by Hold, Sleep, Fear or Silence (Note, this spell is called Mental Shield before Level 3) Prophet, Shillien Elder, Elven Elder
Mental Shield Temporarily increases resistance to Hold, Sleep, Fear, and Silence. Anyone who might be affected by Hold, Sleep, Fear or Mental Attacks (Note: this spell is called Mental Aegis after level 2) Cleric gets level 1 so Bishop has it; Prophet, Shillien Elder, Elven Elder have level 2
Might Temporarily increases attack power. Anyone doing physical damage. (Same as Chant of Battle and Power of Paagrio) All mystics (except Orcs) get Might 1 and Clerics get Might 2 so Bishop has it; Prophets, Shillien Elders and Elven Elders get higher levels.
Power of Paagrio Temporarily increases clan member's attack power. Anyone doing physical damage. Can only be cast on Clan or Alliance Members. (Same as Chant of Battle and Might) Shaman get level 1 so Warcyer has it, Overlord gets higher levels.
Prophecy of Fire The spirit of an ancient warrior temporarily possesses the user. Consumes 5 spirit ores. Everyone who is dealing physical dmg (archers/melees), or in some situations who is recieving physical dmg (20% pdef is included in that buff), or usage as second btb (20%+- max hp) Hierophant
Rage of Paagrio Temporarily reduces alliance members' P. Def. and increases their P. Atk., M. Atk., Atk. Spd. and Casting Spd. Generally anyone who is not tanking or might be tanking. (Same as Beserker Spirit). Overlord
Regeneration Temporarily increases HP recovery. Anyone taking hits. Prophet, Bishop and Elven Elder
Resist Aqua Temporarily increases resistance to attacks by water. Anyone taking damage from water based attacks. Good when fighting Spellsingers. Prophet and Spellsinger
Resist Fire Temporarily increases resistance to attacks by fire. Anyone taking damage from fire based attacks. Good when fighting Scorcerers. Bishops and Prophet
Resist Poison Temporarily increases resistance to poison. Anyone taking damage from poison based attacks. Good when fighting Spellhowlers, Overlords and Warcyers. Elven Elder and Prophet
Resist Shock Temporarily increases resistance to resistance to Stun attack. Anyone likely to get stunned. Good when fighting any class with Stun attacks. Elven Elders
Resist Wind Temporarily increases resistance to attack by wind. Anyone taking damage from wind based attacks. Good when fighting against Spellhowlers Shillien Elder and Prophet
Shield Temporarily increases P. Def. Anyone taking hits. (Same as Soul Shield, Change of Shielding and Blessing of Paagrio) All mystics (except Orcs) get Shield 1 and Clerics get Might 2 so Bishop has it; Prophets, Shillien Elders and Elven Elders get higher levels.
Shield of Paagrio Temporarily increases alliance members' shield defense rate. Anyone with a shield, but can only be cast on clan and alliance members. (Same as Bless Shield) Overlord
Sight of Paagrio Temporarily increases alliance members' Accuracy. Anyone doing physical damage. Castable only on clan or alliance members. (Same as Chant of Eagle and Guidance) Overlord
Song of Earth Temporarily increases P. Def. of party members. Anytime party is taking physical damage. Swordsinger
Song of Flame Guard Temporarily increases party members' resistance to attacks by fire. Anytime party is taking damage from fire attacks.  Useful against Scorcerers. Swordsinger
Song of Hunter Temporarily increases party members' critical rate. Benefits anyone doing melee damage. Swordsinger
Song of Invocation Temporarily increases party members' resistance to dark magic attacks. Anytime party is taking damage from dark attacks. Swordsinger
Song of Life Temporarily increases party members' HP regeneration. Anytime party needs extra healing. Swordsinger
Song of Storm Guard Temporarily increases party members' resistance to attacks by wind. Anytime party is taking damage from wind attacks.  Useful against spellhowlers. Swordsinger
Song of Vengeance Temporarily reflects damage received by party members back upon the enemy. Excludes damage received from skill or remote attack. Anytime party is taking a lot of physical damage. Swordsinger
Song of Vitality Instantly increases party members' maximum HP. Anytime party has need for the extra HP. Swordsinger
Song of Warding Temporarily increases party members' M. Def. Anytime party is taking magical damage. Swordsinger
Song of Water Temporarily increases party's Evasion. Useful for archers and dagger users. Swordsinger
Song of Wind Temporarily increases party's movement. Anytime party needs an extra speed boost, for instance when chasing someone in PvP or running from someone. Swordsinger
Soul Shield Temporarily increases defense. Anyone taking hits. (Same as Shield, Chant of Shielding and Blessing of Paagrio) Overlord, Warcryer
Speed of Paagrio Temporarily increases alliance members' Speed. Everyone. Castable only on clan or alliance members. (Same as Wind Walk) Overlord
Tact of Paagrio Temporarily increases alliance members' Evasion. Dagger users, archers and possibly Tyrants. (Same as Evasion and Chant of Evasion) Overlord
Vampiric Rage Partially restores HP using damage inflicted upon the enemy. Excludes damage from skill or remote attack. Anyone doing physical damage that is not from a remote attack; i.e. will not work for archers (Same as Chant of Vampire) Shillien Elder
Wild Magic Temporarily increases critical attack rate of magic attacks. Anyone doing magical damage. Elven Elder, Shillien Elder
Wind Walk Temporarily increases Speed. Everyone. (Same as Speed of Paagrio) Bishop, Elven Elder, Shillien Elder, Prophet
Wisdom of Paagrio Temporarily increases alliance members' Casting Spd. All casters, this includes Orc Casters. Castable only on clan and alliance members. (Same as Chant of Flame and Acumen) Overlord