[Mirage] has two extremely strong weapon buffs that allow her to deal with various bosses or high level enemies. We subsume a defensive QoL ability to give her additional survivability and efficiency across various content.

Quiver is chosen because of its synergy with Eclipse that allows it to snapshot light buffs while invisible. Dispensary and Null Star are also good choices that fit into the build ability stats.

Eclipse and Hall of Mirrors are such strong buffs when used correctly that you can run almost any ability in the game that allows you to deal with certain content more easily. Examples include using Spellbind to [Protect] yourself from status procs and knockdowns or running Energized Munitions against bosses with timed windows of vulnerability.

Sleight of Hand and Prism are both nearly useless on this build. Either can be replaced for your subsumed ability.

[Enemy Radar] mods help you and your team to find enemies. The nature of this build will sometimes force you to track down stragglers. The aura can be switched out to [Corrosive Projection] or Speed Holster depending on the content.

Ability Duration is extremely high but most content can arguably be done with less. If you're having issues with your energy economy or you're annoyed by having to constantly recast abilities you should drop one or more ability strength mods for additional survivability and efficiency. This applies to everything but the Null Star builds.

[Augur Message] can be replaced for [Rolling Guard] or [Vitality] depending on the difficulty of the content and what ability you're chosen to subsume. This also doesn't apply to the Null Star builds as they want max duration for more damage reduction.

Arcane [Fury] is used because most [Mirage] builds thrive in a melee oriented environment, especially with gunblades or Exodia Contagion. It can be replaced with any other arcane to suit your playstyle.