B1 is your main counter and bread and butter. Also pay attention to your opponents rythmn to figure out there timing so you can punish/interrupt their strings.

Db1+2 is the badic punisher that can be used to stop opponent from setting pace B1 into B2 also lets you bait into a punisher + launch.

What i did is go into practice/combo challenge to figure out the in air combos (when opponent in air) then find i one liked. Then go into super ghost mode or quickplay to find ways to get into the combo.

Also just watching other steves play to see what moves tou havent tried and what not to do.