Top Down Shooter 3D Camera angle.

Guys, what is the best camera angle for 3D Top Down Shooter for Dangeons?

Something like this.

I think it depends on your game design; maybe the best way to find out is to rig up a camera and mess with whatever local angle tilts the camera down or up. try a few variations in game and decide which is best. You could also vary the angle based on where vertically the player is looking.