You mean with his body slams?
Give me an example in your wildest imagination what Kid can possibly do better than the disarming. Hehehe, Note that kid all but confirmed he doesn't have anywhere near G4 level strength when he's commenting on Luffy having "that kind of power?
SO please. now im interested. tell me what you think Kid can possibly do here
Yeah, you are not trying to downplay or clown, obviously....
But about his possibilities... depending on how far Oda wants to go.
In absolutely extrem (far away from what i assume as possible in one piece at that stage) he could be able to manipulate the iron in the blood of everyone, controlling their bloodpressure, even let their heart stop beating, could use the iron in his blood to form a little knife which cuts straight up into the brain. Or blow him up from the inside with the metall.
More realistically, he could bring metallpieces into Kaidos body and cut kaido with that from the inside. Or he could build different kinds of armors for himself, may even connected to mechanical ussage (like franky does manually), cause we know he is mechanical-affine. He can stall the Yonko with another kind of armor or prison.
What i can realistically assume also is kid creating some kind of storm of metall around Kaido and Big mum, also connected to CoC and CoA, which has thousand of little sharp pieces cutting around and giving a great tag team opening. For example, Luffy and Kid charging for Kaido and Law uses shambles to change their position more or less randomly with metallpieces, which are storming around Kaido. Would give them the ability to attack Kaido without him know from where. Also Law could just shamble metall in Kaidos stomach to give kid the possibility to cut him open.
Magnetism can be the most ridicilious and overpowered ability, if Oda is willing to. All depending on his creativity and plans. But they are more countless possibilities.