How to stop FPS drops from 60 to 35 in Nioh 2 combat?

During massive enemy ambushes, my frame rate would plummet from 60 to 35, a fatal stutter in a high-precision action game. I tried closing all background browsers, but it only freed 600MB, which felt like a drop in the bucket for a 16GB system, leaving me feeling powerless. I used the GamePP Process Priority Manager to deprioritize background tasks and reclaim 1.8GB of zombie memory. The memory monitoring panel showed usage dropped to 12.5GB per HWiNFO, with memory pressure at 88-94% per HWiNFO and temps at 40-45℃.