Hello, I just wanted to share my views for your question.

Rank these skills:
Unholy force-1
Shadow dance-1
Fatal burst-1
Curse-1
Vermin swarm-1
Hellblades-1
Leap-1
Vampiric vitality-2
Sanguinary wrath-1

Equipments up to you but use health and attack gems more and map powers to main display- Fatal burst, Shadow dance, Leap and Vermin swarm, attack in the order I've written.

HOPE THIS HELPS YOU!