Full Mythical Trang Oul's set
Heart of the Oak
Jewelry: Mara's amulet, dwarf star and raven frost
Marrowwalk
Classic Necromancer Hellfire
Annihilus (or titans)

Esoteric Alteration (mara's)
4x Ist Runes (wear mythics at level 56 convert to best pet damage runes available gradually)
3x Rainbow facets

MAX: (in order)
-Raise Skeleton
-Skeleton Mastery
-Skeletal Mage
-Revive
-Summon Spirit Wolf
-Might of Grizzly
-Raven
-Golem's flame

1 point:
-Amp damage, Weaken, Decrepify, Lower Resist
-Iron Maiden
-Life Tap
-Dim Vision, confuse
-Summon Golem, vigor, flesh, fire
-Golem Mastery
-Summon Resist
-Bone Armor
-Cyclone Armor
-Poison Creeper, Carrion Vine, Solar Creeper
-Oak Sage, Heart of Wolverine, Spirit of Barbs
-Summon Grizzly

You won't be invincible in this build but you won't die very often as monster will have trouble dealing with all of your summons. I did a level 88-89 run through all hidden ubers up to Lilith where I died so there is likely some min maxing/resist improvements to be made but I had a lot of fun with this build. walk around and cast curses on mobs and bosses and let your minions swarm them.

Start by maxing skeletons, then revive, then wolves. All stats in to strength until you need to wear gear at which point you can respec a few in to int I think I did 22. Get to level 51 and put on any 4 ist gear to power through to level 56, once you hit that put on the above gear and you will be able to sprint through all quests.