The divebombs are always a pain for me. Even if I get in the trench with the group and run back and forth when the green mark and Twintanias focus bar pop... I still manage to mess it up somehow even when I'm planted on the group the whole time.
I've never been able to make it past the divebombs to the twisters and I honestly don't think it's because I don't know how to dodge them.