The Proper Use of Gauss Barrel

[RiceisNice]

2.5 GCD with a 1.5 cast time. I don't follow your train of thought, but you have the wrong idea on how cast times work.

Your GCD starts ticking down at the start of cast, not when the cast finishes.

You can do 2 split shots in two GCDs (5 seconds) regardless of if you have GB on or not.