This map has everything you need to level up your perks quickly!

https://onedrive.live.com/?cid=57B33CF5BB83FE2A&id=57B33CF5BB83FE2A%21402&sc=documents

To install the map, put the rom file into steam/steamapps/common/KillingFloor/maps folder.

If you need help figuring out how to level up perks efficiently, check out this link: http://steamcommunity.com/workshop/filedetails/discussion/112219729/619568794106154996/

Hope this helps ;)