Since it's a competition for fastest win, everyone try to win by HQ capture for sure.
That's the fastest way to win, but it makes this competition somewhat boring.
People just always choose sami and trick the AI vehicles away then capture HQ to win. That's not challenging at all
So I think you can divide the rankings into "capture wins" and "rout wins", which gives rout win lovers a chance.

You know? That's a very good idea.