The "Tormuse Method." I love it! :D Are you able to reproduce it at will?
Well, I started off at the left side of the map and ended up dancing around the leftmost and second pillar at the bottom. I was being really careful only taking shots when I knew she couldn't fire back. I was safe - HR2 and Int2 pretty much guarantee a Masterminds Brain but it was taking forever. After a while I checked and she was only 'scratched' so I thought, what the heck, maybe the 'Tormuse Method' would work :-)
I headed to the top of the map and set things up exactly as you did. Int2 let me monitor her movements - it looked pretty random in the beginning but she consistently ended up in the firing line. There was one moment when it looked like she might escape, something like this:
.............
......####.@.
......####...
......####...
......####...
.....*.......
It only happened once and she moved back down but it was a little worrying. At some point though the random movements stopped and she basically just kept alternating between being in the firing line and one step away. All in all it worked like a charm - she went down pretty quickly once I got going.
I was in a state of mad panic, flying by the seat of my pants when I came up with that. :P
That video of yours is ridiculously awesome (I've watched it twice)! That bit at the end where you think your way through to a win has an almost mythic quality. Bet the documentary 'The Road to Everyman Angelic' would be fun to watch :-) (The interview with the Spider Mastermind at the end would be the best: you'd have a lot of hellspeak and a translator saying something like:
"Look, the dude had no traits and a weapon that did no damage and no hitpoints. Should've been just another day at the office. I don't know what happened!"