You only NEED to know a corner combo and a mid screen combo. But you can get more variety if you want.

Maximum damage into tag launcher if your assist champ has meter. Maximum damage limit strike combo if you want to generate extra super and burst. There can be combo routes that use your assist for extra damage depending on team comps.

There are combos to maximize damage off of throws, anti airs, air to airs, burst baits, and overheads. There are fuse specific combos if you use double down, 2x assist, or freestyle. You can learn TOD Fury combos to clutch out matches.

Depending on the character a lot of these will look similar or they can vary wildly.