Note: This strategy is very hard to execute, it will take a moderate amount of skill if there are 4 ap hunters on the team, it is recommended you have 1-2 zombies mains to guide you.
Dead End Independent AP Hunter Speedrun Strategy
Round 1-9 - take a window, killstealing is encouraged.
Round 10 > Open up the office. 2 people in office and 2 people in alley (in office, one person takes the 2 windows adjacent to shotgun, and the other takes the 1 far window)
Round 10-19 > Kill the mobs when they come out of the windows as fast as you can. Round 15 and 18 have blazes, so watch out and don't die.
Round 20 > Inferno spawns on the last wave, repair all the windows, and run around with inferno in alley if it targets you, if it does not target you, get as many hits on it as you can.
Round 21 > Rush to open up hotel, apartments, power station, and rooftop. Buy sniper (replace pistol) and iron leggings which are both located in apartments, then buy iron chestplate and extra health perk which are located in the rooftop, and then on your way down buy quick fire next to the power station door. Make sure you headshot the mobs so they die instantly, be aware of the mobs so you do not get swarmed.
Round 22 > Go to garden. Upgrade both sniper and shotgun. Kill mobs after you do that.
Round 23-30 > Go to the office corner (next to the far window) stay within 1-2 blocks of it. When you see the zombies escape the windows for the third time, rush forward. Repeat process. Also someone can open gallery to rooftop and get ammo when they need to and then go back to the corner.
IMPORTANT NOTES:
Insta kills spawn in patterns
Pattern 1: 2 8 11 14 17 23
Pattern 2: 3 6 9 12 18 21 24
Take the insta kills when you see the third wave of zombies (The zombies all spawn at once 3 times)
Save the max ammos for the next round in 11-20
Utilize both weapons, whether it's pistol shotgun, or sniper shotgun.