This is just a quick test done in standard. The idea is to use Wurm's Molt to sustain the self damaging from Forbidden Rite and counteract the downside from Mahuxotl's Vaal Pact.

I'm using Pathfinder to easily sustain the Quartz Flask so the leeching never stops. Self casting FR would also be possible but I thought CwC is more fun.

Here's the current PoB https://pobb.in/phbmDXXOYpVd.

I'm posting this here because I have no idea how to transform this idea into an actual playable build. I'd really like to read your suggestions!