If it enhances his kicks then Raid suit Niji should have blasted and broke oven's neck like base sanji with no raid suit did.
But Oven didn't even move an inch even with raid suit.
<< How can it improve durability but not strength kurva
the material durability is hardness means it improves strength kurva >>
So rs powerup wouldn't rise his ap while zoro and luffy rised their ap wait wouldn't those accelerators give him momentum to attack .