Do you have a photo of your rock scape? Best to take from top view.
I suggest having 3 or even 4 6060 one at each corner and all aiming towards the center of the tank.
In this way the water movement are mostly downwards.
If your sandbed have problem due to this then hang the tunze higher up.
I've 3 6100 at 3 corners and red dragon 12,000 l/h (8000 l/h after head lost) at another corner.
Flow is good and so far never spotted any blind spots. Maybe inside the rock scaping got blind spot but I guess so far good for my SPS which is spread around the tank.