ya just wait until you hit those cold/phys immunes in hell
you get quite a few in countess runs or anywhere else there's high numbers of ghosts. You'll want an alternative for those situations. many use reapers toll for the decrep, Im using a high damage obedience on merc for CB, while I have a lightsaber on switch (i know, sounds silly, but you'd be amazed how fast those phys/cold immunes go down between my merc's CB, the LS damage, and the occasional firestorm from my torch).
Either way the CI/PI's are a reality and the bane of the windy's existence. I've spent many lame minutes wacking away in hopes that my firestorm would go of and kill the silly thing, while my mercs life slowly ebbs from the constant battering (they usually also have some silly aura like might or fanat too..go figure) Enter lightsaber...woot! Course I guess any weap with elemental damage thats not cold, or magic damage would work (haven't tried baranar's yet...hmm...got one on a mule)