With this staff coming back in Sanctum, the lightning tendrils rework is looking juicy for inquisitor. Could even just pick up battlemage and use LT totems as hiero.
Marylene's fallacy, hatred, HoA, awakened controlled destruction, RF, pain attunement...easy 10-20m dps without much thinking.
Sample PoB for reference with heatshiver/CotBs
https://pastebin.com/fVa5dsBd