retime runs starting each segment on the first round on the last available frame of lets rock and ending each segment with the last available frame after pressing continue on the experience screen, for retiming nago, retime the last hit should be the frame his health hit's zero.

otherwise this is just a fight for the fastest ssd

This is somthing we wont be doing please read DBcades forum post https://www.speedrun.com/guilty_gear_strive/thread/xytsf

If it's helpful, I'd gladly retime them with IGT (adding together round times), assuming there's no mechanic that pauses them. I've done that for several games in the past, maintaining public spreadsheets to this end.