Anything at least marginally useful is welcome.

Faster character switch: F3 -> Click -> F5 -> Esc

That's good

Footage of zero skill megaman in under 14s taken from a random boshy let's player:

My own strat. Been having less frustration with this (take heed of the wording here) than Anso's, so sharing. I take my time between reloads because not concentrating ruins it. 10 attempts in a row + timed.