my first class is necro summoner + enigma(or teleport armor if u is lucky), to level 80/85, it's easy clean cow level hell

20 points to following ----> skeleton mastery, raise skeleton,mage skeleton, corpse exp

1 to all summon
1 to all curse

strategy:
spam corpse exp and clean easy inferno cow and make easy all class

maybe you need good merch act 2 for coming summon