I use:
Shadow Timers - for DOT timer, (I prefer this over MFClip, but it's not bad)
Quartz - for latency addition to cast bar/customize-able cast bar
Tidy Plates - easier to select mobs, and track multi-DOTing/CCs imo.
Elkano's Buff Bars - tottaly optional, but I like to be able to customize the way my temporary buffs/procs are displayed.