The way i use this skill vs elites is on start of battle, i try to clump them up as close as i can and then hit sss. Usually it hits with all 7 strikes and elites minnions/champs are well under half hp (but none has died). When using vs white mobs however, sometimes sss stops at the 2nd 3rd hit,
and usually i have killed some mobs, but i can tell from the duration and the number of explosions (pandemonium) that not all 7 strikes hit. I dont know how the search engine works for this skill but obviously needs to be looked into.
This usually happens when there are different kind of mobs around me. So once again, if nothing dies from sss it hits with all 7 strikes, but when things start dying, someties it wotn hit with all 7 hits. And yes, those creeps are in the area where sss is casted.