What gems should I use for my catagoon full dex build?
red gems on weapons for any pvp build, reason being is that crits are unreliable in pvp agaisnt full con builds, red gems provide safe damage (kind of rng based but better than trying to crit a full con wizards with aias)
green and yellow gems on weapons FOR PVP PURPOSES is not recommended.
yellow gems on top/pants for physical def and blue gems on boots for magic def
on gloves, since you are a dragoon and not a lancer i recommend yellow gems on gloves for block penetration. And if you need accuracy you can enhance/transcend your gloves.