Play gayer against floaties
Not necessarily as gay as "I only laser and let them approach into my bair" but I don't think I saw a single spaced bair against his shield --> one grab can mean one stock against Peach and puff
also don't try to combo with shine that much.
Often utilt is much better against floaties
at low - mid % you can also try dair --> dair combos, most ppl expect the shine and DI and miss their opportunity to roll out or do whatever when the first dair didn't pop them up
When the first dair popped them up its even better because you can extend the combo a bit or dair them onto the ground and techchase.
dair --> grab also is good if they move away from the "being-hit" animation or SDI (i like to dthrow- techchase)
dair --> dtilt if they SDI and move to far away to follow up with anything else
PS: grabs get more important in floaty-matchups imo BECAUSE you can either throw them in the air where they have a not-that-awsome dair (as long as you don't jump right into it) or you can dthrow techchase
Furthermore shieldpressuring hasn't the payoff it has in other matchups because you can't really do devastating combos if their DI doesn't suck, but you still get ***** from one grab