Tries really hard not to have an aneurysm.
And the recast time on Gravity is thereby lower. If you have a 2.7 second cast on Gravity, your GCD spins at 2.25s. All of the above calculations will still hold firm.
3x2.7 = 8.1s for your third Gravity to hit
3x2.25 + 0.2s cast time = 6.95s for my fourth Gravity to hit.
Nothing changes. Except for the fact that then after that 4th GCD spin, I'll only be 9s into my Lightspeed timer, allowing me to get one last swiftcast heal out.
Lightspeed does not affect a change in your GCD's spin. It doesn't affect the recast time at all.
I literally just showed you a graph that shows you - without a doubt - that you gain +1 hit of Gravity in the exact same amount of time. The DPS will be identical when that 4th Gravity hits compared to when your third Gravity hits. I can follow this up with Cleric -> Essential Dignity -> Aspected Benefic (or just Benefic II with your GCD, since it'll be instant cast!) without skipping a beat. My Cleric drop happens a full second faster than yours, meaning my Essential Dignity is hitting before your heal is even beginning to cast.
Please actually look for a flaw in this logic, rather than spouting the same thing I disproved in my previous post (reproduced from your current post below).
You're just really enjoying completely ignoring the facts to keep spitting out the same concepts of discrete integers in a discussion of the continuum of time spent and how that relates to DPS and healing efficiency. Triggering the global cooldown fewer times does not change the fact that it takes longer before you can do anything else at the end of your third cast than I can at the end of my fourth.
I have yet to level AST to 60 myself, but this is all pretty common sense coming from number crunching and application of my extensive knowledge of healing on both WHM and SCH in these sorts of situations (dungeon trash garbage) before and since 3.0.