Yeah - it happens with blood spit and only two of them use it so, focus on killing those two quickly and you are fine.
In Arx, does that also involve demons? If so, that would explain why I haven't had issues (that I remember, anyway) there - the demons don't attack me, generally because I completed the sewer missions prior to their trigger.
There's a work around with Qanna too - kill her while she's still petrified and no issue. I don't know if there is an EP difference or not but it likely isn't significant even if you get less using the work around. Really, I don't think EPs are earned killing summons.
Last edited by caninelegion; 01/08/20 09:23 PM.