Hardest settings tool assisted speedrun!
I use Radel loops in the corner for fast fights and I only use other combos as finisher or to put enemy into the wall where's it's possible to loop. The second character has an infinite but it didn't seem useful at all so I may have lost a few frames choosing Lynn and also lost a decent ending.
If you want to watch the original speedrun that gave us these strats, watch https://www.youtube.com/watch?v=fTmZ5-gOxPM&ab_channel=theadictt
See you around!