What exactly does Plaqued Heart Curse do? I tested it some time ago and I was unable to notice any effect at all.
Nonetheless the meleepet + Lich build is indeed very interessting but I doubt that the damage buff from lich is worth 11 points. Embrace Death will not proc in most boss encounters, Plaqued Heart does seemingly nothing and lich has a 5 min cd.
On the other hand what to skill instead? For Bursting Bomb you have to skill to much crap and Bone Hord is quite unimpressive...
Edit: I find Netherworld deception usefull to get your mutilators close enough to the boss