What do you want to come with this new revamp?

Bishops
-Get rid of Doom.
-Make master level of Shining Ray 20.
-Give them a new buff that adds All stats to parties, or make them receive like -40% damage.
-Reduce the % damage or their skills, they are supportive.
-Make MP Eater an Arch Mage only skill. Give Bishops a party MP Recovery skill with a 15-30 sec cooldown.
-Remove Big Bang, and give them a skill that gives % Def, Magic and Wep. Att, Eva, etc. Make it have a cooldown.
-Make Holy Magic Shell give 100% MP too.
-Make Dispel have a small % of getting rid of seduce, wep and magic cancel, zombify. Something like a 10%-30% chance.
-All of bishops skills must stack with potions and other skills.

-Make Buff Mastery's "Buff Duration" PARTY WIDE!

Also if you make Dispel be able to cancel super DEF / MDEF, give the same utility to warriors, just half the % or whatnot.