What does this mean?
You will be able to get your character closer and closer to iLvl90. It will be a very good idea for people to get their EX Primal accessories, as a lot of these have become BiS (best in slot for maximum job performance). You will have to do your research to see which accessories are BiS for you. I can add BiS lists for different jobs as I find them. Remember that even though an iLvl90 drop may not be BiS, it is still best practice to get that item for the time being for the iLvl increase, and adjust the rest of your gear and food accordingly to keep your acc cap for Coil.