here's a vod of me doing good https://youtu.be/usGgswFPDzw?t=2705 (6-0 in grands)
- fullhop strong bair should be a goto option at any percent. It doesn't matter if they cc or shield it.
- luigis will try to catch your jump out of shield with dsmash.
- fullhopping (sort of in place) while luigi is really far away is good. He can't cover diagonally in front of him in the air kinda like sopo.
- when you get luigi offstage try to shinespike. or if you think they'll airdodge to stage, stand there and uptilt or upsmash (i find shine to not usually work in this situation)
- soft shield to avoid misfires
- low percent: fullhop or short hop drill -> shine stuff is good
- off shines you can fast wavedash fast nair or dash into jc grab (i dont see other foxes do these much)
- if they down b while coming down, sheild it, then wavedash out of sheild punish (upsmash, grab, uptilt depending)
- shark with uptilt good, though it may trade
- high recoveries generally very good