Edit: MrCookTM beat me to it.
There's a couple posted in this thread;
http://forum.square-enix.com/ffxiv/t...S-for-end-game
The second one has 1 less primary stat but boasts an insane 966 Crit at 428 Skillspeed, (640 accuracy).
The problem with skillspeed besides TP, is that your GCD is so fast you end up clipping during mudras because the GCD has already reset before you could finish, slightly reducing the potential gain you get from the faster GCD. Basically you're reducing the window for executing ninjutsu, which should happen before the GCD resets.
I guess the question becomes "how many extra GCD's do you gain with high SkS within a specific duration in relation to phases (phases divided by jumps etc) in specific fights?" If the increased number of GCD potency outweighs the potential potency lost from a crit/det weighted build, then I could see how that could be merited.
