As much as I like speed sharpening, it's hardly a "necessary" skill, especially since the Star Knight set has steady hand built in. I tend to only sharpen when the monster is moving to another area, even if I have purple sharpness still; that way I don't lose sharpness in the heat of battle. I often finish hunts without seeing my sharpness degrade once.
Bio researcher and tremor res are far more useful, depending on the monster. Evasion is just the best for everything (better than divine protection, in my opinion, because avoiding attacks altogether is preferable to being hit slighty less hard). With fully upgraded Star Knight armor, and a defense-honed glaive you should have more than enough defense for even the strongest monsters.
I don't have a Wii U.