No need, yours is already good. The hidden stat is synergy, which checks if your talent/heavenly favor pairs perfectly with your magic type. ex : fire blessing has synergy with fire magic type. Yours has synergy with perfect constitution, so it's good :D
Well, enhancer is using magic to strengthen your body, so it's technically still matic. But, you can still use other magic, even if that's not your chosen magic.
As for the first question, lol it's definitely weird for me to rank my own creation, but I'll do it. ( It's my personal favourite, so you shouldn't take it seriously. )
Common : Disciplined
Uncommon : Regen or Relentless Vigor. It's a tie between these two for me.
Rare : Good-looking for the story and how you're one of the best looking people in the world.
Elite : Sage eyes for the look and story.
Supreme : Martial zenith mogs