MCH Overheat should activate automatically

[Shurrikhan]

It's a good idea, faster 1 2 3 is always better than spamming 1 five times in a row.

This would be fine, too, and even less bloated.

Hit skill, get x upgraded attacks. Sounds fine.

Only reason to do otherwise would be if, given the duration exceeding what's necessary for the number of shots, one would have reason to weave in un-upgraded shots within the period, but now that MCH lacks its unique combo mechanic (as it has since ShB's gutting), I don't see why that'd be necessary.