Short hop dair, or failing dair, if it hits, they will either trip, or be in hitstun. Following up with an f tilt is quick and gets them away from you. Doing anothwr fair/bair isnt guarunteed because of how hard it is to hit someone with it when they are on the ground.
An auto canceled sh dair could also work, but youd need some forward momentum first.
Also another thing, up airs string together for a great juggle,
You can do things like uptilt>upair, faling upair, double jump up air> fast fall jump up air, double jump up air, you can keep them in the air by catching their landings with up tilt, or up smash, or even dtilt.
Another thing i dont see you utilizing is villagers wall jump. It could be easier as a surprise attack and a mix up rather than just ballooning to the edge, regrabbing and losing your invincibility. You got lucky because mm kept missing those dairs at the edge.