Opinions sought on Tunze placement

[Delphinus]

I have 4 6105's in my 280g right now aimed in such a way to create an alternating gyre.. long story short the effect is neat but I'm not really convinced it's a good enough flow pattern because there is a fair amount of detritus settling on the rocks.

Think I'm going to change things around a bit. Any opinions out there for good placement? Anywhere along the back wall and left side are options.

Currently they are in the corners with the exception that the right back corner has 2 and the front right corner is empty due to the right side being visible.