I am pretty sure if your setting up DHCP reseverations for devices per MAC, setting static IP in the device is redundant. I still do it because I find it makes the time it takes to connect less, but I don't think it improves performance in anyway. With that said, anytime you have gaming or gamefuel rules applied to a certian IP, you need to make sure there is some procedure in place so only that device gets that IP, whether that be DHCP reservations on the router or static IP's on the devices.