The New and Improved Burning Butcher

So with the new infernal hordes, I’m unable to kill the butcher in Torment III within the set time, even though I completed pit 55 (Torment IV access).
The quick fix is to not despawn him, cause the problem is that with my hand of Naz build, my minions are doing everything except hit the Butcher, cause they’re surrounded by plenty of other monsters and my damage isn’t good enough. Partially, also my reduction, cause I can’t stay in his melee range for too long, diminishing the effectiveness of Soulrift.

If I’m already at the end of Toment III, I shouldn’t have this much trouble with him. He should be hard but doable. Are you having the same issues or are you switching builds for hordes and if so to what build?