First and foremost I'd like to let y'all know that this build was revised from a build I saw Blank post in the DDRNG discord, but this is how I've found it best works for me.
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I'm Fewd! I stream every weekend and am always willing to help you out. Feel free to check me out or ask questions on Twitch, Steam, or Discord.
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Twitch Link: https://www.twitch.tv/fewd
Steam Link: https://steamcommunity.com/id/fewdpoonz/
Discord Link: https://discord.gg/Vt2KR3e
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Build Start:

1. Place the Strength Drain and Ensare auras right near the Forge/ location shown above.
2. Place a 4 or 5 DU Buff Beam (BB) from near the Forge towards the street lamp as shown above.
3. Place 16 Owl Nests on the side of the Buff Beam furthest from the Forge.
4. Place 2 Holy Bulwarks on the BB near the Forge side and 1 on the BB by the Owl Nests.
5. Place 1 Mushroom Spore on the Owl Nests Towers on top of the BB.
6. Place 1 Forest Golem on top of the BB near the Forge.
7. Enjoy!
    

Hint #1: 

• These Owl Nests are all on top of each other, I only have them shown as above to show you the count of how many there are.

Some things to know for the build: 

• I start Survival on wave 23. 
• I use a Tower Booster for the entire time.
• To get the 4 Cats per run, you press F6 AFTER STARTING wave 24.
• You can very likely use less Owl Nests as well. I think Blank built his entire setup only using 1 Chest worth of Mana. You can try that for sure if you want to save around 30 seconds of build time.