How do you do a back hip circle flyaway? It's not possible to do this without an empty swing or an awkward cast that is going to get deducted in 6. I'm not saying people don't do it I. Some levels or circumstances. I'm just saying there's no way to do this without incurring deductions, and there's also no point. Personally I have never seen a level 6 intentionally do a back hip circle. I've seen clear hip attempts that didn't get credit.
Back hip to awkward cast whatever is very common in Xcel routines, but that's a little different and the requirements are different.