What are you geared for? Like how much AP and spellpower as a result of it?
I am thinking the BoA spellpower mace with 22 int is the way to go. You lose some melee damage, but pick up on a lot more mana and about 60 more spellpower for your heals. Helps keep you alive and with exorcism spam.
I would also stack as much stam, armor, and strength as possible to maintain good damage.