Configuring the UI
My user interface is HEAVILY customized. It has evolved over the years to suit my play style and aide in my muscle memory. Where exactly I have everything would make little sense to anyone but me. As such, I will not share every little quark I have done.
I will however list a few critical things you want to do to enhance your UI and give you an edge in battle. I have broken down each into which role type they will benefit the most, they are all good things to add to all character types.
It is super critical as a tank to know if you have the threat of the boss. Setting up your UI as per below will aide you in identifying if the boss has swapped off of you, or help track the HP and channels of a second target. Helpful in dual boss encounters, or when you keep to keep track of a debuff on your co-tank.
Go to your interface editor
I believe, by default, the focus target is in the top middle of the screen. Make sure it is enabled by clicking on that UI element and toggling the enabled button
Target of Target
If you are TANKING, this one is a MUST. You are an official Noob if you know about this and do not use it
Damage Class Tips
Tracking your DoTs
Most DPS classes have some form of DOT they place on a target and need to keep up. There is a lot rotationally that accounts for this and takes care of it for you. However, downtime in an operation boss fight may cause you to have to forgo where you were at in a rotation and reapply DOTs again to maximize DPS.
The following UI changes will make seeing your DOTS on a target MUCH easier to see and keep track of
GCD cycling colors, cool down text and enhancements to your ability windows
Make your BUFF bar and Debuff bars bigger and put them somewhere that makes sense
Healers have 2 main task, heal and cleanse debuffs. The game does a terrible job of setting up ops frames for performance healing. I recommend selecting your Ops frames and editing them with the below values. Note that I set up separate UIs for 16 and 24 player content (changing the scaling a bit to accommodate).
The final option, "Show Only Removable debuffs", can be helpful on some fights, but a disaster for others. Revan Hard Mode for example, selecting this option will prevent the healers from seeing the debuffs they need to cleanse for mechanics. It's safer to leave off though with some knowledge and tinkering, turning it on can clean up the frames for you further.
My UI, General Overview
My Operations Frame goes in the space in the middle between my HP bar and my Targets.
Very helpful guide to extend max camera distance. I think I set mine to 40.