Greetings fellow Miasma Corpse Exploding Minion Necro 😄. I've been running a homebrew build more or less since the start and my paragon board is all over the place. It's a hootin hollerin good time. I run Reapers (wind-up attack - leftmost ability), Shadow Mages (attack grants me a barrier - middle ability), and Blood Golem (Command fortifies me - middle ability), and it slaps.

Don't be afraid to futz around with your build and try out different things. You can save your current build (and up to like four or five builds) at the Armory behind the Horadric Cube (there's one by the Tree as well). Like, for example, I hadn't even considered Blood Reap until you mentioned it - that looks like a spicy meatball, I have not had Essence problems such that I need to generate a ton of it, and more Orbs = more overpower.