Empress set Preparation.

Good idea.
Would you suggest farming legend coins and getting 70% accessory dex scrolls and scrolling Kenta goggles with them?
Or the more Bold option getting 20% accessory dex scrolls and scrolling the goggles with white scrolls? with the help of maxed Dilligence adding 10% success rate it should only take at most about 30 scrolls to fully scroll 5 slots for an easy 20 dex.

Edit: And I believe the training skill and Link skill would count since it's adding onto total stat regardless of if you have equips or not.

of course they count, however you only need 170+dex to equip the set, once you have the full or good part of the set equipped, the amount of dex required diminishes greatly.

my agares set requires 160 dex, i have 178 dex with it equipped, but if i unequip my 3 dex ring, my dex goes down to like 120~130 and set unequips. i equip the ring again, and voila.