MCH Overheat should activate automatically

[Cabalabob]

Upgrade Hypercharge to Heat Blast at level 35.

Remove Hypercharge and move Rook Autoturret to level 30.

Remove Hypercharge and move Heat Blast to level 30.

Any of those could work.

Doesn’t fix AoE up to level 52, you want to have to use a single target GCD heat blast to activate overheat instead of an oGCD hypercharge?

[Shurrikhan]

Doesn’t fix AoE up to level 52, you want to have to use a single target GCD heat blast to activate overheat instead of an oGCD hypercharge?

Hypercharge "releases the energy building in your firearm, causing it to become Overheated, increasing the potency of single-target weaponskills by 20." There is no AoE Hypercharge, regardless, until level 52, at which point Auto Crossbow likewise becomes an activator for the Heated Up window.