I'm having issues with my rig pulling off 16 clients of WOW. Trying to get to the bottom of what I'm doing wrong. Wow graphics settings are on low. I get intermittent low fps. My isBoxer profile is default, round robin balancing. I've seen MiRai get 20-30 clients to work on his rig, I'm sure I'm missing something. Any help in the right direction will be appreciated.

Screenshot at character screen - http://postimg.org/image/m5q71d49t/

My system's 3DMark is http://www.3dmark.com/3dm/6956402

My rig:
i7-5960x
Rampage V Extreme
Evga GTX 980 SC x3 with SLI Bridge
32gb Vengeance LPX DDR4
Samsung SSD 850 EVO
Evga 1300 G2 powersupply
Windows 7