Wemfs
The only morality in a cruel world is chance.
JI2 gives you enough advantage to go for your 50/50 starter if that's what you're asking. Ji2, b1 jails and so does ji2, f2. I tried to poke out of both and couldn't. I think you have to hit the ji2 at the correct height for it to jail tho. Just gotta practice landing ji2 in the right spot for the combos to jail.
ji1 seems to jail with b1, but not f2.
ji1 seems to jail with b1, but not f2.