Last spark from the ashes

I didn't think it would work, but I had to give them the chance. I do have a plan, though. Can you set a longer fuse on one of your flash-bangs? Say, twelve seconds or so?

*Having picked up some shiny piece of metal, Samus holds it at the edge of cover in such a way as to see the arrangement of the Vex outside.*

They've seen you use them a couple times this fight. They probably know by now to shield their sensors. When it doesn't go off, though, they'll relax. And then, flash! They're blind, and we take our opportunity. Still, they have us bottled up in here, so when the lights go out, they'll probably open fire and hope to catch us as we charge. Which is why we're going to flank them with a PINpoint portal, instead. Thoughts?

*Ms. Nice Samus has just clocked out. This time belongs to Space Bitch.*