Thanks for the insights. In my testing, I had once stumbled across a slightly different line of play that grew out of the basic 3-kill strat. I think it involved both Kamorge and Ione missing 99% attacks, but it did result in a 4K for Bastion.

I did not know about the bonus XP for overkills. That is actually a really big deal and probably changes the run significantly. Seems like a basic thing, but wow, thank you for pointing that out.

As for the RNG-state thing, yes, I think you’re right. The game has determined what you’ll roll on the to-hit chart before you go, so backing up and picking a new attack, different position, etc, does not change if you hit. Not relevant for most gameplay though, at least as far as I have tested. Is relevant for save-stating though.