9f b2 would be baller, and so would Flash's normals building meter faster than the zero percent that they build now. He's such a meter pig (maybe not as bad as Scorpion, but still), especially now with MB lightning charge being good, and the only way he can build any is off of getting hit, basically. Lightning Kick dash cancels works alright, but I don't think there are very many match ups where you can really do this.
I tested a bit, and by my best guess, you have to do b22 around 75 times to build 1 bar on block.