Any good builds that revolve around Invigorating Drain?

Kammakazi

Besides S&B Magicka Templar w/ Blazing Shield & Batterinos

dday3six

Yeah, there are some interesting Magicka DK builds that use it. They use Sword 'n, Board, Heavy Armor and Bloodspawn, iirc. They actually do better in 1vX, than 1v1 thanks to Draw Essence, Proxy Det, and Devouring Swarm.

Asmael

As @dday3six noted, mag DKs use it, usually as a replacement for Fossilize, because it enables the extra regen from Supernatural recovery. I haven't tried it personally, but that's a thing.