back when i made my necro (it was my very first character in 1.10) he was diecent...
he DID have trouble starting his army, but once he DID get it up, there wasnt much stopping him.
skeletons, when maxed, along with skele mastery and summon resist, will live damn near forever... mages on the other hand will die off fairly quickly, so i suggest don tbother with them (bsides the pre-request)
revives are something that worked, but become annoying, because when walking, if they snag on a wall and get stuck, theyll dissapear/die if you go to far out of range of them, where as golem's / skeles will just teleport back to you... keep that in mind if u dont use enigma.
i was able to pit run fiarly ez (as long as i had my might merc on) and i could do all of a5 on my own bsides baal (baal = insta pwn on my summons)
the only thing is, doing runs was effective, but slow.