Push enemy fordward w/h injury or hit

[Memento]

In an attack I made, the character uses 4 kicks in air. Bad thing about this move, is that the character gets hit very easily. For this reason, I added an itr in the frames in between the kicks. These frames are supposed to "push" the opponent fordward, instead of actually hitting him. I tried itr kind: 14 which didn't work. I'm wondering if this must be done with a grab or if there are other methods.. because grab would make it only useful against 1 opponent instead of several.

Any suggestions?