This is Causese' Interruptorder Anchor weakaura configured for Prototype Pantheon (both Gloom Bolt and Anima Bolt)
https://wago.io/interruptorder
This version does NOT use "ERT Note" mode. It does not assign specific people to specific interrupts. It will not flash when its your turn to interrupt. It simply shows a box with a number over the nameplates. Assign people to an interrupt number and have them remember it. (This was made for a pug, where not everyone may have ERT.)
You can move it around with x/y sliders in the Custom Options tab. You can also hide the white background by clicking the white "color" box at the very top of Display tab and putting the alpha slider to 0.
If you want to display only Gloom Bolt or only Anima Bolt, edit Required Mark setting to whatever you mark the boss with (or edit the two IDs, first ones in each field are for Gloom Bolt, second ones are for Anima Bolts). Note that the Renewal boss does not exist until halfway into the encounter, so you can't pre-mark it, i.e. you'll need some kind of automarking solution (or mark it manually with 100% consistency) for the 'Required Mark' approach to work for Renewal.