If your looking for alternative options for Denizens on plutonium;
There's a better tranzit mod that removes denizens and adds a bunch of improved features to tranzit.
https://forum.plutonium.pw/topic/8087/release-black-ops-2-zombies-tranzit-fix?_=1622141147433
Theres also a cold war mod that works for all maps but is especially good on tranzit. (Denizens still appear but staminup is buffed so you can outrun them but still makes training in the fog hard cause you can only outrun them if you run straight. Also fog is removed which is amazing.)
https://forum.plutonium.pw/topic/10473/release-zm-cold-war-zombies-mod/2?_=1622141147436
Both of these are made by teh_bandit, he makes some really good stuff. 