Valiant map 6, UV Max, 2 players

Strategy: I get the red key and BFG as soon as possible, while Arfmile clears the tower and spawns in the super shotgun imps before proceeding to the blue key guarded by spiders. After that we clear up.
There is room for improvement here. Arfmile could clear up the flooded areas first and get the BFG before going to the spiders. Also, in the end he wasn't sure where the leftovers where, which I ended up finishing by myself. I think under 5 minutes is possible.