This map is very enjoyable, and lots to do and figure out, wonderful aesthetics too
There are a few things I would look into though:
Lots of guns have the "move to bottom of screen" issue when you move, its a simple weaponfile fix and makes the guns feel so much better, yet so few mappers actually do it
Maybe add Respawn points/mechanics, when you are all at the Castle and your teammates spawn in the village it is near impossible for them to get anywhere before death, especially with that one player wide building to get through, one zombie = death.
If you don't have the M1911 on you you will pull out the WaW M1911 on death
Maybe remove zombie grabbing?
When the boss was spawned in, the charge at you glowy chest one, I had a floating Kar98k stuck to my character that followed me, only happened on the 2nd spawn of the boss, and when 2 players were timed out, for reference
Boss spawn rate, I know its like it is for a reason, and you want the map to be challenging, and I'm sure lots of people complain about this, but 2 Panzers on round 12/13 or whatever, after the other boss round before, is overkill, to me it has the same effect as Project Viking, where you cant fully enjoy the map due to the boss spam making it harder to get to a respectable round, especially when your teammates spawn at the village ages from anything, with a pistol, and 2 panzers after them...
There are a few smaller things I noticed too, such as Vector's worldmodel clip is positioned in wrong, straight not angled
Several gun sounds seem very quiet, mainly the BO1 guns
The Guided Launcher weapon, has no reload sound, and its sight has the double blend issue with lots of the map, making the sight invisible and glitch out
Front of Deadshot machine's glass is borked, shows as plain white glass and not the text for "deadshot daiquiri"
Some clipping around areas of the castle feels awkward to get around, certain doorways and the corners of the roof for one
Credits for Wraith in the topic? As it was used to get the MK3 model, and Blackcell model?
Also doesn't the topic title need to have [T4M] in it if the map uses T4M?
Trying to be constructive here, and not come off as nitpicking, I thoroughly enjoyed the map, and you have all clearly worked very hard on it, and have all done a fantastic job
Just some fine tuning and it can become that bit better