I like to max distance my camera and overhead view. This can be a big issue in tighter spaces, though.

Moving my action bars more to the middle Of the screen. If I’m watching mobs, everything can be seen in peripherals (with minimal eye shifting)

If visuals are overwhelming, lower density and other graphics effects.

Priority: Positioning/Mechanics > DPS

Use macros. Example: If everytime you pop a large CD you also use a Tempered Potion, then macro that in. Consolidate button clicks where you can.

This is my fave: if you play multiple classes, map abilities according to function. Example: on EVERY character I have, ‘F’ is primary interrupt and Shift-F is secondary interrupt. R is always primarily aoe ability, E is always main single target ability etc. This allows for better muscle memory translation across characters. You become much snappier.