Armour/Ring: Pyra/Csilk, partly for the 5%/5%, but also because the 63spd makes it not annoyingly slow when you're walking around unspeedy. I can't stand Hydra. Then once you've chosen Csilk, Pyra fits better being a mix of HP and Def, though swap this for UbHP or UbDef if your playstyle fits these better.
If you like to focus on firing your shuriken, Harlequin is good for that.
Leaf Armour I'd probably not say "no" to, but it's more use on other classes, so save for archer/huntress/etc.
Spectral would get a look in, if not for the depressing 2%.
Weapons: after the buff Muramasamune whatever it's called works fine, you don't need Doku, but if you have one then yeah. I carry both for no good reason, if I needed the space I'd ditch one. Ray Katana isn't terrible if you want to have a coward-ninja, but if you're doing that you probably want to choose armour/ring specific to Ray to make that work.
Ability: DCircle with UT as swap if lucky to get either.