Build Description
Make the ensnare on tower stack (hint 1) 3 times smaller. (can replace the ensnare with a ethereal spike trap if you got the tower stats to deal with the mobs before they overrun your phys walls)
Blue arrows are DST angles
Spider queens are mainly for killing spiders so your tb/ib don't cooldown.
The reflect beams in front of the phys walls are 1 DU but touch each other (bonus tip; reflect beams are more DU efficient if you chain several 1 DU ones together)