Battling overheating new 360 build

6 vein pump, therm is a 180 I believe.

That actually leads me to another question, why would the thermostat temp setting matter if it's wide open at this point anyhow? I've seen people say how running a lower temp therm will help cooling issues, but I don't see how considering the thermostat is open whether it's a 160 or a 190 when you're running 200+ temps.