It's quite a task to get this [Mirage] build knocked out. But with nearly 300k endo and 2 umbra forma it's also damn expensive.

Just by keeping "Hall of Mirrors" and "Eclipse" running there should be no troubles in most steelpath missions. "Spellbind" is particular usefull for missions with poison ( that means infested :P ).

Prism isn't that usefull in this build due to the lack of range, but you can still use it to blind smaler rooms of needed.

If prefered you could also switch "[Augur Secrets]" with "[Flow]" to get a higher energypool and instead of "Primed Surefooted" you could use "[Handspring]" to get 8 points of capacity to put whatever mod you prefer into the "[Augur Secrets]" Slot.