Alright, I'll tell you the plan. Basically, King Serperior and I came up with the idea that the enemy would launch a smokescreen across the base. Now, within this smokescreen would be lots of tiny little bots that would form a much bigger robot (about human size) right next to Warren, grab him, then blast out of the base before anyone noticed he was gone.
As for the defenses, go ahead an have the artillery strikes seriously damage those, almost destroy them but not quite.