stuff like
--for starters, cargo fthrow/bthrow for DI mixup;
weak bair (spaced, auto-cancel optional) into grab, or alternatively into jab +dtilt (instead of jab+jab) because dtilt combos super-floaties. Don't forget to jab first;
(Play with triangle platform stages to maximize combo potential)
grounded cargo uthrow under side platform -> FH uair FF autocancel -> utilt -> three uairs for damage and free GP charge;
at low percents, FH double bair combos all floaties into nair -> fair (spike lol);
fullhop double attack is good in general.
Also, I'm personally not a fan of doing this but you can kill like everyone through the ceiling at stupidly low percents with mostly charged GP -- but you may as well just do full charge. It's lame as **** but if you want to lose all of your friends then this is your strat.