Yeah void won’t hold aggro unless you let him build it a little before you start dpsing. Let him get 2-3 taunts off then dot. This is really inefficient though and slow. Tough it out till you get to like 40 ish
You get full shadoweave gear or shadow wrath pieces. Then you spec into affliction and drain tank. Use succubus or felhunter. It’s a breeze once you get dark pact.
Can easily juggle 3-5 mobs with all cooldowns and decent kiting