The objective of stage 1 is to hold on to Radar 2 for as long as possible. But definitely make sure that Radar 1 doesn't get blown up first. 2 players will go to Radar 2 to delay the Allies. One will be a panzer, the other will be an engineer. Use explosives to cause the most damage, and also be elusive. Your goal is to kill as many as you can while being outnumbered, so straight up dueling will not help. The rest of the team sets up at radar 1. The LT, Panzer, and Med set up on bridge to make sure no one comes through tunnel. The second med/eng is set up at northeast tower at the railing. He needs to watch for people coming through spawn, but still be able to cover tunnel. The med on the bridge should be doing this also as best he can. When Radar 2 is blown up, stage 2 begins.
Stage 2 revolves mostly around the Northeast tower. There will be one LT in the corridor to radar 2, his job is to stop the incoming allies going upper. He should mostly use nades. Outside of that corridor there should be a Med setup on the spawn side rail looking down for anyone going under radar 2. He backs up the LT in the corridor. The second med is setup on the radar 1 side rail of the northeast tower. He can shoot guys coming from tunnel and anyone trying to get to the radar 1 stairwell, but also should back up the LT to some extent. The engineer needs to be in the corridor connecting to radar 1, the one with all the boxes. He should be setup in that corridor so that he can see into the other corridor and shoot incoming allies. The panzer sets up at the bridge and kills incoming allies from tunnel. If he goes down he really needs to communicate to the others to start paying attention to tunnel way. The second LT sets up above the mg42, he needs to kill anyone coming through spawn way. And if anyone gets past the panzer he needs to kill them as well.