Why does my FPS drop from 144 to 70 in Naraka multiplayer fights?

I was thrilled with 64GB of RAM until multiplayer fights caused my FPS to tank from 144 to 70. I tried enabling High Performance mode in the GPU driver, but it didn't help memory scheduling and just raised CPU temps by 5℃ per HWiNFO. I used the GamePP Resource Scheduler to set I/O priority to Highest and synchronized the power plan to High Performance. RTSS monitored frame times dropped from 12-35ms to 8-14ms, and memory temperature remained at 52-58℃ per HWiNFO while AIDA64 showed 70-110ns latency.