Well, a fuge is supposed to have low flow, otherwise all the water pounding down would shake your algae and pods too much. You'd really have to have an area for the water to pour into before hitting the algae. I think your original design works best, with the fuge in the middle, or go with the intake on one side, fuge on the other, and return in the middle (which was one I had sucess with).
Definitely put a one way check valve on the return in case of power outages. I didn't have one, but I solved that by aiming my return nozzle up a little, so it would allow air to break the siphone once the water receeded enough. I would have preferred a one way check valve.