The title pretty much explains it.

No idea.

We can sub him. And why didn't I know about this?

Biscuit won't be back until Monday; he's in Colorado at the moment.

Anyone up for another run tonight? Any requests on maps and levels?

I think after tonight the need for an assassin class can be brought into serious question. With proper timing there is nothing stopping the demoman from making the requisite uber-medic picks. I think two demomen or a soldier is probably the better idea. Thoughts?

I disagree. The Spy's attention would be split pretty heavily, and you're also missing out on several of the utilities of Scout such as the slow effect Mad Milk and the Mark for Death on the Fan of War. There's also the matter of Scout having instant respawn and thus being able to go back for the money even if he dies, whereas the Spy will undoubtedly miss some if he dies.