Hint 1: 4DU beam on the edge of the stairs, make sure it touches the auras
Hint 2: 5DU beam connecting the 2 aura stacks. If your aura radius is too low for them to connect (middle stack is on the bottom so it has to reach through the top floor) build buffs at both stacks first then sell them after you made the connecting buff.
Obviously all LT-s are on the beams, i put them on sides for better visibility.
If you have problems with trash mobs hitting crystals you can swap out 1 LT for top+bottom ensnares.
Hint 3: 1st wave electric-immune archer might shoot the crystal if your buff is unupgraded. You can add a reflect (if you use snare on top+bottom you have 1 spare DU for it) or make sure you up the buff quick
Hint 4: same as 3, happens less often
Hint 5: put archers here if you have problems with djinns desummoning the buffs
Required stats: Damned if i know. I'm sure it works in the sub3k range if you use archer minions to block the lanes and keep ogres at a safe distance from your Lightning Towers.