Wow, this level is definitely interesting. A more open-world level, you can choose which order you want to obtain the keys. I got the blue key first, since that put me in a good place ammo-wise and that path has a lot of RNG in it. The yellow key section is annoying - either you get a berserk pack earlier in the map (requiring different routing) and attempt to punch a dozen Cacodemons to death, or you take your time by shotgunning them. I hate punching Cacos, so I'll take the time loss. The red key section can get pretty hairy if you don't get two good BFG shots on the Cyberdemon, though I somehow killed him with the shotgun this time. Not to mention elastic collisions make getting the first Soulsphere a major pain. I also screwed up my ammo usage at the very end of the mission, costing me a bunch of time there as well. Overall, not enough BFG ammo to comfortably go through this map fast. At least I got sub-10:00.