The main key is mobility and Smash attacks. Combos are
not Mac's games, though they can be done, the idea is to blast them with Smash attacks and then use those to either pressure their shield hard by using the
Smash or by catching air landings with a
or
smash. Only do
Smash if they're landing on the same level as you or if you're not sure you'll be able to reach since it actually moves you a lot farther forward.
does hit underneath platforms, so that's great for poking if you ever find yourself in that situation.
Also grab. Grab a lot. Once you give people the idea of slapping that C Stick, they'll be shielding way more often. Grabs are a great way to get damage in. Half the time I just pummel until they let go since that lets me do more damage than an actual throw. Not like we have useful throw combos/kill throws anyway.
KO Punch snipes underneath platforms like
Smash, use it if you can. Running KO Punch is usually what I do, but be careful if you do it near a ledge, since the momentum
will carry you off stage. But otherwise, the only way they can avoid a running KO punch is rolling toward you since they'll end up behind you. Jumping/Shielding/Rolling Away doesn't do much unless they're far away enough.
I only know one combo.
tilt is useless now, but
tilt replaces its old functions. You can use it to combo either into an
Smash if you make them land on top of a platform or Rising Uppercut if they can't DI far away enough. I haven't tested if it can combo into KO Punch, but it may be able to?
Recovery is simple: counter an edgeguard to use your I-Frames towards the ledge or just get close enough to use any of the two basic recovery moves. It usually works if you know when to use it. Haymaker is okay, great for reads and those trying to recover high. Also great meme kills if you're into that.
On the airfighting spectrum, F-Air is still F-Air, and that's really all I gotta say outside of Haymaker. I never really used NAir, but I know you can do it to disrupt and then follow up with a quick F-Tilt. I'm not that quick with my controller so I don't use it.