Here's a pressure sequence I've been playing with. It is match up dependent, some forward advancing reversals can easily stuff the back dashes, but against Cassie's Getaway Flip the dashes are safe.
I've opted to start with b1 because it can't be neutral ducked, and won't whiff on crouch blocking females/ninjas.
The basic sequence is b13-d1 option select Rib Breaker-b13-choke-backdash
It can be modified in several ways based on hit or block.
Here are the ways.
1) b13 blocked
Do b13-back dash. Plenty of time to confirm this. Backdash is safe against non advancing reversals.
Damage- 1.5% (chip)
2) b13 hit, D1 blocked
Rib breaker comes out, grabbing opponent out of block. Against Cassie set to regular getaway flip, EX Rib Breaker required.
Damage- 22.5% regular, 25.5% EX
3) b13 hit, D1 hit, b13-choke blocked
Back dash after choke. Safe against non advancing reversals.
Damage- 10.75%
4)b13 hit, d1 hit, b13-choke hit
Final back dash not required. Leaves you at -5, thus ending the pressure sequence.
Damage- 24%
If the entire sequence is blocked-
5.75% chip damage, about 1/2 bar of meter.
It's not the most damaging pressure sequence, you're not going to chip somebody half to death with it like LK or Sorcerer Quan's Hex spell can, but it is relatively safe.
Of course, if you have meter, ending with EX Knives is a better option to end on, setting you up for a grab/b312 mix up.