I didn't really use a "trick". What I did for trial 5 was d/b~f~d/b+A, ~f+AC. Essentially, I did it like I would do shoulder loops with Urien in 3S. I was charging the second d/b before the first shoulder even came out.
Hold d/b, go to forward, immediately go to d/b and hit A (the shoulder should now come out), and DC the second shoulder at the latest possible moment.