[archaeolept]

w/ spell foci and normal positive magic MR subtraction, the devils will have an effective MR of 12. that's not so hot, and they'll be taking serious losses from say 5 quickened theurgs, w/ one theurg casting buffs.

the real advantage of banish demon is that it costs no fatigue, and so the theurg/communicant machine will Last longer. and principe hold up pretty well.

as well, the buffed communicants will do a very good job soaking up attacks from the devils: luck and twist of fate will mean that they will survive on average 5 attacks; astral shield depends upon the level of the caster (5) and i think the spell foci might well still add in, which would lead to a number of turns of paralysis on top of this...

after scripting finishes they may well cast enslave mind or soul slay, which will have somewhat lower penetration but still be fairly effective.