Also, I think you underestimate just how much Skill Speed is on the new HW gear. Just screwing around, and equipping all the i210 gear that has Skill Speed on it, according to Ariyala you can get over 1000~ Skill Speed. At 595 my GCD is already at 2.04, remember.
http://ffxiv.ariyala.com/R400
Granted, it is a pretty crappy selection of off-stats as your accuracy is obviously WAAAAAAY more than need and you Crit and Determination are really low, but just this is just messing around just see'ing how high it could techinically go.