Pure stats aren't as useful all the time. Everything in this game is situational.

If your trying to evade attacks, stack as much evasion gear you can then equip agi gear in slots you don't have evasion gear.
For TPing you want to cap out your gear haste at 26%, then work on att and acc when needed.
For your WS it really depends on what WS you are using. A lot also depends if your in in abyssea or not.