Pretty much this. Nintendo is using toothpaste.Just go with normal cpu termal paste. Noctua is one of the best brands. These 8.0 W/mk stats often doesent mean much
I removed the shielding in my lite, and even with just decent thermal paste (I think it was thermal take paste) the fan ramps up less often than stock.
Just the cooling on stock (and the shield tv), it's a heatpipe, fins, and a very small fan. A whole lot isn't needed to keep the chip cool.