Bots are pretty brutal- unlike players, they have no fear, and have only learned how to block down (but are surprisingly good at random chambers). You basically always have to prepared to block the one behind the one you're fighting, and without cheesing the AI your team won't get very far if it's more than 4 people.
I've been making daily attempts to beat the game mode for a few weeks now, and man, does it suck to lose it all on the last round because one guy pulled a bunch of AI the wrong direction and died. I just want to finish it and never play it again, but I'm trapped. SOS.