Ninja: Walk in shadow.

[Exstal]

Something like this - http://ffxiv.ariyala.com/OD8Q
Ninja have a very good equip stat wise = there is almost no choice between crit and det, as acc+crit/det is better that crit/det+skillspeed and your biggest problem is how to get acc cap without sacrificing crit/det too much.

Accuracy is too low. You need 535 for flank at least