1 - The auras should be on top of each other, them being spaced out on the side is just to show what's in the stack
2 - This applies to the traps. If you're struggling for space and/or don't have a Jester with 0 TRange to move them you can temporarily unequip your traptress gear for the same effect, just don't forget to re-equip and repair the traps when doing so (I do it this way myself)
3 - The excess towers on the bottom right behing the black lines are there purely to verify the final DU count is 110 for the purposes of this build
This works for both NM AND RL in up to 4p, just make sure you occasionally keep the auras topped up so they don't pop, and upgrade the buff beams and golems first, if your Herm THP isn't high enough they may just get shredded by Demon Lords otherwise.