407% Ability Strength, fully strips enemy armor and shields in 1 cast of Pillage due to Ability Strength bonuses from stacked Molt Augmented and proc'd [Growing Power].

If you have 18% Ability Strength from archon shards (3 normal or 1 tauforged + 1 normal shard), you can bring [Brief Respite] to shield gate. Or you can just hope a teammate brings it instead. At least two Casting Speed archon shards also heavily recommended.

For even MORE invincibility and utility, the Vazarin focus school is recommended for Mending Unity as it increases the range of Covenant and heal range of Penance, as well as offering more invincibility via Protective Sling.

Molt Efficiency can replace Avenger if you REALYYY want to. You can also swap Avenger out for anything else if you don't value red crits (But what's the fun in that?), with recommendations being weapon fire rate arcanes (Acceleration, Tempo, Velocity, Strike), or Arcane Pistoleer if you're running a secondary that can reliably get headshot kills to provide infinite ammo to both primary and secondary.

If your feeling REAL spicy, you can replace [Rolling Guard] and [Transient Fortitude] with the other Augur Mods (Message+[Reach]). This would give you more range on Thurible and let you shield gate with Pillage and a Decaying Dragon Key (at the cost of duration) IF you have 4 Augur mods (base shields so damn high).