Flow question

Currently have a mag9 and a Wp40 on my tank, mag9 is soon getting replaced to a dc9000 thatll be run at about 50% to help accomadate a new chillers flow requirement. My tanks been running for about 8 months now and ive taken it extremly slow in stocking wise, but mixed is my goal with my first SPS coming in probly a month or two. Im debating on putting a few WP10s or wp25s behind my rock work to create more random flow...Heres a pick of my scape let me know what you think

 

If you find areas of weak flow it sounds like you have a good plan. It is a difficult balance to get the flow right in a mixed reef.