Your best post-break combos are GS B and 4A. GS B carries further and leads to 109 damage. 4A, against most of the cast, is 112 and leaves them in a FDHT state, which gives you a 3B/2(k) mixup in the middle of the stage. Some characters though, like Nightmare and Maxi, won't give you a BT hit after 4A, which makes 4K BE not give you the same wakeup, so you would use GS B against those characters instead. The list of characters this happens to is small, though, and its more than worth it to learn who 4A doesn't work on.