MCH change I would like to see.

[TankHunter678]

Yeah I think it would make sense if flamethrower built heat and it could be 5 every second. The rotation would be.

Bioblaster (20s cd) -> Flamethrower (fullterm 50heat) -> Hypercharge -> Auto Crossbow -> Bioblaster -> Spreadshot

As for building battery to summon bishop/king I agree with TankHunter678 just add battery building to Auto-Crossbow, I think 5 each hit this way you have to have do two Hypercharges to summon your aoe bot and I can see them maybe next expansion adding a aoe Anchor for battery gain.

If you throw that much Heat building onto Flamethrower you may need to buff the heat building on the ST rotation, otherwise you run into an issue where Flamethrower gets thrown into the ST rotation just for heat building just like in SB.