GurgusWand of transfusion
In addition to charming enemy mobs (good for suppressing their ranged attacks), WoT also heals allies. It’s helpful to heal Ghost, Guardian, and Spirit allies, and sometimes corrupted minions as well.
Pairs well with Wand of Corruption
RBGIt also pairs well with Warlock and Ratmogrify.
You can play this “Plaguemancer” style. Summon rats, give them the soul mark with the transfusion wand and when they die they spawn wraiths.