im sure you figured this out already but 1 pump isnt going to cut it. I'm not sure with that many rads 2 pumps will cut it.
i have a similar config to yours with a couple less rads and my god is it a pain in the ass to bleed....
Res -> d5 vario -> d5 vario -> 4930k (ek supreme hf) -> XSPC RX360 -> 4x 7970 lightnings EK blocks with ek 4way connector -> black ice 240 -> EK 480 xtx -> res
Also my res inlet and pump outlet have quick disconnects. GET THESE!!!! what i do when bleeding is switch them back and forth so it changes flow back and forth... it makes bleeding 1000x easier. that way it can push air out so much quicker.
my temps are reasonable for a system like this. but with the added right angles you will have you may need to get 3 pumps to make bleeding viable