necro summoner "could" (dont know the new patch, probably omega gonna 1 shot skeles) run all the content solo except crucible and was an important part of it due corpse explosion. so, skele damages are completely fine, but i agree on defensive part. they die too fast and can't be replaced like druid's summons. druids could solo crucible last patch, so i'll go with druid summons this time.

and skental power gives 1 pierce for each level to zombies as far as i know.