http://skynet.campus.luth.se/~chosen/bam/bamtri2.bsp
1) this has less brushes
2) this is finishable (with full kills too)
did you notice the previous map was "playable" in dm too!
Would like to see someone do a speedrun on this.
I tried to go even further but it would probably need modified compiling utilities (you can't currently make a map without a single world brush with either aguirre's or the vanilla qbsp). If it's possible in the engine, I don't know.