This is your standard, general-use Mirage build. It's focused on using Hall of Mirrors and Eclipse to massively increase your damage output. This build is also solid for boss killing - Condrix Raids, Sortie Lephantis, Hemocyte, etc. I would not use it for Eidolons because, as far as I know, there is currently no way to proc the Eclipse day buff on yourself anymore.
Rolling Guard and Shield Gating combine to help you deal with threats outside the Rift, like Nullifiers, Arbitration Drones, or other priority targets.
You can always replace Primed Continuity with Energy Conversion if you wish. I personally don't, as it's tough to always keep the Energy Conversion buff up for both Hall of Mirrors and Eclipse without leaving downtime between casting one of the abilities. That build is located here.
I use Arcane Rage as I commonly pair Mirage with strong Primaries, but you can change this for the best damaging Arcane for your main weapon.