"Have the finish corps blow those forts. They won't be able to move into them but they can "shatter" them! " - interesting, anything special I need to get them to attack across the no-attack-line? Cause simply right-clicking does not do the trick for me.
T11 north:
With a little help

I decide to tackle the Soviet forces around the swamp and manage to move some units up to Lake Lagoda.
Hopefully 1st Panzer and 269th Infantry will be enough to capture Sviritsa after the Soviets move to bring in reinforcements, the last remaining port connecting Leningrad to the rest of the Motherland. If I have to I will throw every unit in the area at the fresh defenders and since there is no railline I hope there will not be too many of those.
One attack is performed on the Leningrad front, hopefully forcing the Soviets to move in additional units here which will not be avaiable further north. Another 2 by the Cav, having no chance vs. the SEC to its NE, but managing to rout the infantry to the east. The rest of the Leningrad front remains static for now, waiting for its isolation.
About 500 tons of fuel and supply are dropped for XXXXI Panzer and XXXVIII Korps, hopefully enabling them to face anything the Soviets might throw in their way.
Around Velikie Luki the pocket is slowly compressed.
Along the western front V and VI Korps take up defensive positions and part of the mobile forces are moved back towards Smolensk.
