0% (level 29 cleric) (level 49 paladin)
http://wiki.project1999.com/Revive
50% (level 39 cleric)
http://wiki.project1999.com/Resuscitate
90% (level 49 cleric) (level 59 paladin)
http://wiki.project1999.com/Resurrection
96% (level 56 cleric or cleric epic at level 50+)
http://wiki.project1999.com/Reviviscence