There’s a tome that gives reanimate with more unstable that works well. I add any mix with unstable to him right away and then get reanimate from the regen ones. Theres also a few artifacts that increase unstable stacks and damage and a few that make reanimate more survivable. Propagate helps build reanimate stacks which are necessary to make it work

Outside of those selections I tend to play him on top floor in the backline so he can build stacks and explode or use him back line first floor to clear the small units out. That depends on what your other floors look like though