Skeleton necro builds

Excuse my language but, why are necromancer skeleton so crappy It takes for ever to do a T40 NMD and can’t barely do 50’s. I lvled a necro class so i can be a necromancer. I switched to bone spear and I can clear T80 NMD with my eyes closed. This shouldn’t be the case and I should be able to clear T80 with skellys.

Blizzard please look into it and simplify the skellys stat requirement.