[X] Engage in a lively theological debate at knifepoint.
-[X] In other words, start face-tanking and getting aggro from afar (Beam o' Righteousness) or up close (fisticuffs), so Maria's free to do her thing.
PRIEST FIST FIGHT
Also, I was thinking of a possible pre-boss battle strategy: We could try setting up a warded area first in the arena, then hand crosses to our allies. This way, there's a relatively safe spot in the battlefield where our allies can retreat and heal-up or reload without getting pancaked.