Changed UI size to 80%. Pushed all my hotbars to the bottom of the screen, placed boss HP slightly above my hotbars. As I started leveling more roles, I changed my UI to fit all.

With tanks, I moved the enmity list next to my hotbars. Healers, I moved the partylist closer to the middle of the screen.

After I got an Ultrawide monitor, I moved the partylist next to my chatbox.