Hello again!
I don’t think mixing another template on top of the Combat Fury systems is a good approach, as you already have all the basis you need there to build something similar to Absolver. And yes, even if Absolver behaves more like a fighting game, it’s core is still tied to Souls.
The best start would be to setup the foundation of a Soulslike, try to construct it as a boss rush initially, just the player fighting the enemy, using the systems and animations from the package. Once you have that, start tweaking values to bring your combat to that faster pace, with quick attacks and combos, from Absolver.
Also, check the community on how to approach the prototype, specially if this is your first game. A similar thread covering the same topic can be found below, their findings couid be useful for your goal.