Case fan orientation

Hello all, I have an H6 flow and I am trying your figure out the best orientation for case fans, as there are plenty in this case. There are 3 120mm intake fans on the front, 3 120mm intake on a 360mm aio radiator on the top, and only 1 120mm exhaust fan at the back. I just ordered 2 140mm reverse blade fans for the bottom of the case to direct more air to the GPU, but I am worried that I have too many intake and that the one exhaust fan is not enough. Should I change any of these fans or their orientation? And if so, which ones should I change?