I stumbled upon an awesome combo I wanted to share, maybe some people already know this one.
Gravebane Wight + Final Sting + Singularity
Singurlarity all creatures share base health, Wight does 40% damage of its max health to all creatures when it dies, final sting give shim one attack at +300% attack then kills him. (add in splashing for more fun)
WHACK! then KABOOM! lol…all enemies typically take 7k-20k damage each.