The Pi won't be the issue here; in fact, it's much better than using a Windows host.
However you must ensure that a) you get enough power out of the ports and b) the power is dissipated.
The former can be solved by a good hub and PSU (which you have) and the latter by good cooling.

However, you can also aid both of those at the same time by lowering the power consumption by veeeeeeeeery slightly reducing the core voltage using the screw in the bottom right corner. Since the sticks are tuned to run at 400MHz, they may not be exactly 100% perfectly set up for the absolute maximum overclock and there might be some performance to be squeezed out using this technique.