First thing you should do when unlocking a new set is upgrading to +11, You should prioritize evolution after this. For evolution, get everything to 6E to unlock set treasure set but you will need to 9e later on.

This is a good use of garnets to greatly raise equipment cp, I would get set to atleast purple once you finish evolution.

These are very important for CP and PVE/PVP.

These are not a priority with garnets unless you are very rich with garnets and have already maxed everything else, weapons are a different story and you should get them when possible!

This should be your biggest priority to flip wings for profit with merchant.

T1 wings - 5k-30k

T2 wings - 22k-74k

T3 wings - 90k-240k

During kundun seal, it will be your biggest priority but only when you are getting very close to it starting.