Rip.. I'm doing 214 fbc into d1 and I hit her flipkick but she still reversals me.
And what are some ways to open them up?
Some Bnbs?
The timing to jail after Cassie's flip kick is pretty tough, if you're new to Scorpion don't worry and just keep practicing.
The main way to open people up with Scorp in Hellfire is by conditioning them to block a certain way. someone familiar with him will know to always block low first as that's where his B3 comes from. F4 is reactable but you're going to want to test people to see if they can actually do so.
Here are some BnBs for Hellfire.
214 - Tele - 21 - Spear - JI2 - F4 - Aura or teleport. If you want to keep the pressure up you can apply 214 after the teleport hits or try and bait out armour after Aura. Both have their risks but the pay out is huge.
Same applies for 123 and 114. Note you must do JI2 for F4 to natural combo.
Cancel combos from B3 and F3 would be something like:
B3 - FBC - 214 - Tele - etc
F3 - FBC - 214 - Tele - etc
F3 into F3 is easier if you just to practice that aspect of the execution.
Off of B1 FBC you can do anything you want, also note that B1 dash cancel gives enough time for his S1 and S2 strings to connect but if they block this fast reversals will punish you so always play it safe and run cancel it.