Use these setting and go bed, the bots are too slow and dumb to kill each other in 1 minute.
Also use a wired(or plug and play charge kit) controller (rock band accessories will work too)
Match Type: Local
Game Type: Warzone (or Execution)
Total Rounds: 15
Round Time Limit: 1
Number Of Bots: 1 (or 9 - i recommend this)
Bot Difficulty: Casual
Bleed-Out Time: 60
Friendly Fire: Off
Map Selection: Host
Weapon Spawning: Customize (Mulcher for all)
Map: Day One
I personally put it on execution just in case they get you down to the last man, also despite me recommending the mulcher i leave all the weapons as normal, it is hilarious to wake up and look at the scores.
And i stress again, you do not have to have 9 bots running around, for me i just found it amusing to look at the scores when i woke up!
Video courtesy of Roosterteeth@youtube and Lopez_55
Thank you Darksynopsis for posting the second video