Ok, found out that the Windows Input Simulator works, though it has some major flaws in the case im using it. Having very repetitive button presses it seems to get stuck at a certain point, having only key downs, not key ups. So i would like to get back to function input.
Doesn't anybody know, where the function is located, that handles the input of the button press (keyboard or controller, from the Unity Input Manager)? Or does anybody have a different idea to give the ai the ability of individual moves, not already the combos?