Update 2:
Sadly the 85 Watt TDP did not survive the BF1 gaming test. It quickly got into the very high 90s, and began to throttle. Dropping back down to the stock 65 watt longterm, I still saw it rise to the 90s on occasion. Max Turbo was about 4.2 GHZ on all 6 cores. This was tested at Ultra detail, at 1920x1200, and 2560x1440, on GeForce 1070, playing 64 player servers. So it seems that about 65-75 Watt longterm is all I'm going to get without a delid for Battlefield 1.
It seems that Frostbyte engine games can really push the CPU.
So if you're encoding, doing actual work, or browsing the web, 85-90 watts is perfectly fine with the same setup. For gaming, you have to back down to basically stock long term wattage.
However, I have one last trick. I can undervolt the CPU. I already know that this CPU is very stable when undervolted (reverse Silicon Lottery?), so I'm going to drop it by a full -0.1 and see what happens.
Let's all hope that Intel's next chip handles the heat better, and that some all copper coolers show up on the market.