B2 is really un-safe on block but you can use d1 poke to make your opponent block low. As well if you can get your timing right on b2 then go df2(shocker) if the opponent blocks the shock will come out leaving safer on block.
I love the b3,2 option mid screen or corner. You can lead that mid screen into pretty decent combos or you can do superman after b3,2(holding 2) and that will get them closer to the corner.