dead spots....where to put pumps?

[yamaha racer]

so i have a mj mod on the feft and a k5 on the right and another mj mode in the middle but im getting dead spots, where should i place my pumps?
here is a pic
http://i24.photobucket.com/albums/c3/yamaha_dan/027-1.jpg

[MeVsTheWorld]

I have 4 plus the return. 2 of them are on the bottom back corners blowing towards each other alongside the back of the tank. The other 2 are in the top back corners blowing up and towards the front glass. with this gyre type setup I get alternating current throughout my tank with no dead spots that I can see.

http://i303.photobucket.com/albums/nn142/waronu/CIMG6739.jpg
Hope this helps. http://www.advancedaquarist.com/2007/1/aafeature