In A3S, I only ever hold Spineshatter for if I fail a wash-away cancel with jump and DFD to hit on 2 mobs. Recently I've been as high as 1425 DPS right after hand phase, normally around 1375-1400. I get 9 GSKs off once hand phase is done, the 9th is usually just before the hands go invulnerable. I wish I could see my numbers if my group ran a MCH and/or NIN or my SCH used Selene.