Umm... Truth be told, I havent tested - the blockstun on TAS B is easy to learn to punish with umbrella and AS B can be punished with identical timing. Should you fuck up, you'll either do 3A or whiff a 2A, neither of which are catastrophies and vs. Elysium on legendary souls, I just punished 7/9 TAS B's on reaction with JF Umbrella JF Umbrella, so you could do it in a match. =)