Canopy Ventilation

[Aquattro]

My canopy is fully enclosed and essentially an oven sitting on top of the tank. Before I add fans as I usually do, I thought I'd see if anyone else was doing anything different, or what type of fan config you've found successful. I'm trying to minimize chiller use, and would like to even remove it if possible.
So how are you cooling your canopy enclosed tank? I'm running 3 x 400w, so need lots of cooling