I keep running into this issue in Fire knight stage 16.  Since turn meter is important I'm always bringing in Armiger.  But when he runs into the paragon in i think wave 1, they get into this situation where the paragon has given himself unkillable, and my champions have him disabled but are continually dropping his turn meter so he never takes a turn to let the buff fall off.  This is just an issue on auto, though even on manual it can be problematic with a champ like Armiger who has only 2 skills and is constantly dropping turn meter on the A1.  Now I suppose this could be an issue on any unkillable mob, but I've only noted it on Paragon.

I understand there are champions that can strip buffs or ignore unkillable.  I also understand you don't have to take Armiger and other turn reduction champs like Allure can be AI tuned to not use their turn meter reduction skills on waves.  Still, Armiger is really the only champ I have that can TM control well, and I would appreciate if these endless paragon-like unkillable scenarios could be avoided or at least capped at so many turns, for PvE wave content.