[Trinity] can use Blessing along with other forms of survivability make herself nearly unkillable. We subsume an additional QoL or DR ability to push her survivability even further in more difficult content.

Null Star is chosen because it grants a large amount of DR at max Duration. Quiver can be used to completely avoid damage and to [Protect] some defensive objectives. Dispensary allows you and your team to camp a small area with infinite ammo, health, and energy.

Link is replaced as your range is too short to activate it and it has negative synergy with Null Star. If you run Quiver or Dispensary you can replace Well of Life instead or stay with Link.

Duration needs to be maxed for Null Star and it's beneficial for Blessing and Well of Life as they both have ranges that are not affected by your actual range stat. You can lower it a bit if you're running Dispensary or Quiver to get more Range or Survivability.

Range is extremely low due to [Narrow Minded] and Null Star. You can increase it a bit to make better use of your other abilities but should choose another ability other than Null Star.

Efficiency doesn't need to be over 100% but it makes the build feel more crisp due to the loss of a large range Energy Vampire. [Streamline] is a the flex mod that can be replaced for any other mod of your choice from more survivability to different augments.

[Corrosive Projection] is run primarily to support your DPS during Eidolon hunts but it can be replaced with an appropriate aura if you're doing other content.

Arcane Nullifier protects you from magnetic procs which can completely cripple the build. If you're doing content that has no [Mag] procs then replace it for an arcane that suits your playstyle.