So, I did a thing. I didn't need to do it, but I did it. A razor blade did the trick pretty easily as my vice was too small. Now, a simple (but not cheap. Silverstone XE360-TR5) AIO can dissipate 500W.
This is all without curve optimizer or any undervolting. I just enabled PBO motherboard limits and let'er rip. I think I can maybe push it a bit more in terms of an all core OC instead of relying on PBO, but I need the system up during the day for work. What else should I do with it?