Yeah, interrupts get the short end of the * in this game. So many ways around it. CC is just a better option. If the enemy is holding onto an interrupt, I like to wait till the enemy gets a chase or I get a chase that doesn't involve the ninja I want to cast so they aren't visable when I queue up the mystery and the chase chain makes the system speed ahead to my mystery without letting the enemy have a chance at responding. It's a flawed system, but I don't see any good way to fix it without an added pause when mysteries are cast. That would slow the fights down way too much if every mystery had a few seconds before being cast though.