Icebound definitely does, so the glyph may be useful in this case.
Gorefiend's does NOT work on the blobs on Immurseus. Death Grip, Remorseless Winter, Chains of Ice and Chillblains all work perfetly on those adds.
Tank add in the solo phase on Norushen is easily killable with DRW. Taking the Asphxyate talent can help with interupts.
The adds that attack the NPC's on Galarakas are best dealth with via Asphxyate. This can be used while they are moving and prevents them from even begining to cast their fixate, where as Death Grip does not cancel their charge, only prolongs it.
