two big things
positive case pressure goes a long way, you want more air coming in than what's going out
more fans doesn't necessarily equal more cooling, Linustechtips covered this pretty well in the Blowymatron episode (lol) essentially, a heatsink with more surface area and a normal fan will be as effective or more effective than just pushing more air over a smaller heatsink.
so, naturally a 3x 120 radiator is going to mop the floor with 1x 120 with a big fan on it. my advice, is the 6x 140s are going to in fact push more air than the 360 setup but how much material and how thick is that radiator on those things, and what material is it? Copper radiators are the king in heat dispersion.
Also with extra air you begin to approach the law of diminishing returns, past a certain point you just won't gain much. A bad ass radiator, made of copper with 3x 120mm pullers will perform just as well as a cheap aluminum radiator with 6 Blowymatron 186cfm push-pulls. My Threadripper cranked to the moon at 4.2ghz struggles to get above 50*C load with the same Liqtech cooler you have but I have the TR360 model and with the three pullers on the inside of the case it can provide 500w of heat dissipation by itself with the stock fans.
All those fans mean nothing if they're pulling it hot air too, my radiator is on the front of the case and away from other heat-generating sources. Throwing more fans at it doesn't necessarily mean better temperatures.
1950x / Zenith Extreme ROG / R9 290x 4gb / Win 10 Pro
K6-III+ 450mhz @ 550 / ASUS P5A-B / 3dfx Voodoo 5500 64mb / Win 98 SE