HolyCarp
[14] Master
Astaroth has pretty slow interrupts and his backstep is really short, so you don't even need to be at +2 to frame trap him. Possibly his most threatening interrupter is 6B and that's i20, so it'll still lose to your 2A at -6 (and Omega has loads of pokes that are -4 to -6 on block). As for his faster interrupts, 6K is stab punishable. Duck the second hit of 6AA and punish. If they're interrupting with 66K you can always OS JG or step when you expect it.Speaking of Astaroth, what's the best way to open up an Astaroth player? I know Asta is uncomfortable at close range but he isn't exactly helpless.
What are some good pokes/pressure attacks that can help me open up a person who has a strong defense? Are there any other good frame traps besides 4B?
If you make it their priority to shut down your pressure, you'll be dealing with fewer throws and taking less guard damage. However you should always be mindful of 66K BE and 22B BE since Omega has few option selects to beat out both. You have 2A, 2K, or you can sidestep then attack (this OS allows you to step bullrush BE and interrupt 22B BE). Pokes with fast recovery like 22K, 6A, 3K and WR K are pretty useful too.
2K is pretty godlike against Astaroth. It interrupts and it kills step. And given his slow impact frames, being at -2 against him feels like neutral so it's pretty spammable when you're applying pressure. Though remember that if he blocks 2K he may punish with a crouch grab, so be ready to break A or B (FC A+G ROs forward and FC B+G reverse ROs).
The more you play the MU, the better you'll get at safely applying pressure, even in disadvantage. And don't forget that his block punishment sucks so you can use a few more unsafe tools when you feel it necessary.