I am at chapter 11 and found out that the ATB is usually full after you shift a paradigm.
After performing a queue I tried then to shift again to the same paradigm and it was still full.

This seems to be some kind of flaw that one can explore to oneīs advantage.
Kinda like the w-item trick.

After performing a queue shift to another paradigm and back to the actual one and you donīt need to wait.
It takes time to do this but is fast and considering the large time it takes to perform a queue on chapter 11 it is much faster.

Do becareful though that sometimes the gauge will not be full but almost full.

The mechanics of this are still confused to me but it works 90% of all time.

Forgive me if something is escaping me here.

Hope I have helped.