Nimble Ring IV & Hyper Ring I (Broa/Windia/El Nido)

Be aware that Heal depends heavily on damage range. If you reset most of your INT out and put it in HP, you'll get a Bishop who can't even Heal himself fully in one (or several) casts, nevermind any party members.

Good luck getting enough HP. I'm rather pessimistic so my bishop has pet+autoMP+elixirs/gingers/powers, but I'd be curious to see how many HP it takes to survive without that.