By the way list any high round strategies you made up in the comments please!

-In the mine with the fire trap. The spawns are a reasonable amount, you use the fire trap and hoard the zombies that spawn behind it. If the trap runs out you just hoard zombies and the thundergun is a very good recommendation as its very easy to get trapped here. You are going to need a wonder weapon like the Mk 3 raygun and the Thundergun and a gun of your choice with turned on it is a must, but Its a pretty easy strat if you know what you're doing and have the right guns.

-East Courtyard, Very easy training spot if you have the thundergun.-

Don't have any more off the top of my head, let me know in the comments if you got any more strats. I know this is a shet guide, I made it in like 5 minutes its just what I got rn