I'm getting sluggish response and frame drops during fast combat in No Rest for the Wicked. Should I tighten my RAM timings?

This RAM is rated for 3600, but it felt like 3200. During team fights, it was practically a slideshow—totally ridiculous. Latency tests showed the default secondary timings on these Kingbank sticks were way too loose, with access latency swinging between 75-85ns. I jokingly tried filling the RAM with background apps just to see what would happen, and the system just froze. I had to get serious in the BIOS. I pushed tRCD and tRP down from 18-18 to 16-16 and set tRFC to 560. AIDA64 confirmed latency dropped to 62-66ns, and the input lag vanished. I did have a random reboot 10 minutes into the game at first, so I bumped the voltage from 1.35V to 1.38V to stabilize it. RAM temps are 48-54℃. Exported the data and it's a night and day difference.