Somberness
Lights
It should if done perfectly, but I can't test that. All you need is when each character first recovers.Does it jail standing, then?
Also:
Are you sure it's that small? I swear I've been d3'ed in between the b1 and the 2.
You get hit on the fifth recovery frame after blocking b1, but it hits highish so you can use something that lowers your hitbox to make the next hit miss. It's why 4 characters can d4 between Raiden's strings instead of just d1/d3.