MCH change I would like to see.

[AvenoMatt]

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.

You do have a point I guess lowering it to 5 every 2s so an overall generation of 25 heat would be best

How I'm seeing it.
Bio -> Flame (fullterm) -> 5×Spread -> Bio -> Hyper -> Auto -> 5×Spread -> Bio -> 5×Spread -> Hyper -> Auto -> Restarts.

I'd like to add that this is not taking Barrel Stabilizer into account which you should be using anytime it's up.