I was actually a Thorns Minion necro for most of the season, using a mostly homebrew build:
(WoWhead is putting the ‘best Necromancer…’ caption on it, not me… I assure you, it’s certainly NOT the best… )
I cleared up to T63 Pit with it (pre-patch) and managed to kill all of the Tormented bosses except for Beast and Andariel - I even one-shot Gregoire without any deaths.
I was originally using Iron Maiden instead of Decrepify, but I found I lacked ‘on demand’ damage, so buffed my golem a bit and switched to Decrepify for the DR and CD reduction.
The Cold Mages make all the mobs Vulnerable, all the time, as well as providing stagger, and CC. Hemorrage provided me with constant fortify as well Blood Orbs to keep up my shield from Temerity - Life on Hit and on Kill helps maintain the shield as well. The Sacreligious Ring keeps everyone buffed at all times, and gives me a second Corpse Tendrils - it makes for a very relaxed playstyle too: most things are automated… just curse, spam hemorrage to proc lucky hits/get blood orbs/fortify, and activate golem on cooldown. Watching ranged mobs delete themselves is also very satisfying.
Andariel was a hard-stop for this build: the thorns did a TON of damage to her, but I didnt have enough damage to kill the Tormented Effigies in a timely manner - if we’re not being hit, we dont do much damage! - so I was being stuck in phases where I needed to dodge, and, being clumsy, that all but guaranteed failure. I ended up switching to a homebrew Shadowblight build instead of thorns for Andariel and the Beast, but, ironically, I went BACK to a hybrid thorns/shadowblight build for the Beast when I finally killed him: I was so busy avoiding stuff on the ground (I’m very clumsy so this wasnt often a success
) that I couldnt time the Shadowblight combo properly… so I put on Razorplate and let him carve himself up on my boney bois while I was Blood Misting around in a panic.
This build does undermine itself though: there is so much CC baked into it, that when mobs are stunned and frozen, damage drops considerably - as with the Tormented Effigies, the team needs to be hit to do damage.
I’ve been trying to kill Lilith with my Shadowblight build - observing the mechanics - for the past several days… at least 20 hours so far, and several million in repairs… ready to give up on the game out of frustration. 