Mage Nuggets. Super easy to use, no config. needed, just drag bars around, resize if needed. Does bombs, invocation/rp, mana gems, cauterize, puts your portal spells on your minimap for easy access. It's a great add-on imo.
Tidy Plates/Threat Plates lets you show dots on enemy health plates for multidotting.
I use Elvui to easily see procs for snapshotting.