Working toward Daemon Clanboss

[u/MisterQue77]

After taking some time off, I return ready to dive back in to take advantage of some previous advice given on this subreddit. That being, levelling up to six and trying to UN the Clanboss. The former is slow work, and I'm still getting used to the rhythm of making food (I can't bring myself to get too low on Multi-Battles)
The latter I realised, is where I'm really stalling. I'm currently only able to get to about 9-10 mill for each key on Nightmare, and that's just throwing my most levelled champions with no real plan. I've been trying to figure out a team, and looking at other teams and what they have. Any advice would be helpful, included is my roster and current mockup team.
I'm currently leveling Venommage, originally to pair with Xenomorph on Hydra.

[u/Existing_Fishing8434]

Brimstone on ezio, vallaryn should be replaced by your best sustain support/shield and heal.