Vortech Mp10/40 ecotech upgrade

[puffer]

Great timing!!!

I have a 300g (6ft) in the wall tank for a mixed reef and I just purchased 2 MP40's. My tank's been cycled for a while but just firing it back up. Assuming that I have 2 towers of live rock spaced away from the back wall, what are your thoughts on best placement of these 2 MP40's and the modes plus I have up to 4 additional powerheads?

Someone suggested to place one at each end and face them against each other to give a random current and a different person suggested against it because they counteract each other therefore not maximizing the flow. Your thoughts?

Thanks