This information is a lot more useful, thanks for sharing it. How quick did the Bishop run out of mana?
By the way, people have managed to kill Raid bosses with 4 mages and no healer, all spells. I think they had to run back for buffs and mana 3 times (3 x 30 minutes).
Now that I think about it, possibly Body To Mind could be useful for Bishop as well.