My Specs help

[DefenderX]

Your settings are okay. But you can try two options, maybe they can give you a very small speed up: "Cache Display Lists" and "Skip EFB Access from CPU".

And the rest: Overclocking, overclocking and overcloking. (And you can try the 30 FPS patch -> http://wiki.dolphin-emu.org/index.php?title=Xenoblade_Chronicles )