I think I personally would rethink your airflow. Some may disagree but if you have a lot of heat in there, (high end GPU, OCd CPU etc), your airflow is kind of funky right now. As you know, hot air rises. You have your H100i on the top, pushing air down. Not only that, but it's sucking in hot air from the H100i radiator into the case if I'm understanding you right.
I'd put the H100i as exhaust first and foremost. Even if it means you have exhaust fan on the back side, AND the H100i as exhaust up top with NO intake. I think that would still be better airflow than what you have now. I'd run tests on both setups and see what gives better results.