vital shot before shrap bomb
If you do shrap bomb first then both dots will end at the same time.
I never understood why most people say you should shrap bomb first.
With the rotation I use I can't get in two WS before VS is already ticking into its weak form. I can catch it if I apply VS after Shrap Bomb. Plus, since VS lasts for a short duration it starts desynchronizing with Shrap bomb which I find is better for energy, but worse for DPS.