How does stacking Performance Shifter work?

[Wavicle]

If I have 2-5 Performance Shifter: Chance for +End slotted, how does the stacking work, assuming it does?

[aethereal]

Performance shifter predates the lockouts they've lately been putting on procs (procs: what they need are more illegible, complicated rules), so I imagine that just each power with the proc checks the proc on its own schedule and when one fires, you get your endurance.

[Troo]

it works well

 

five is likely overkill

[The_Warpact]

It was discussed not too long ago in a scrapper thread.