How do I fix micro-stutters during swarm battles in Space Marine 2?

I was blocking Tyranid swarms when visible micro-stutters completely broke my immersion; it felt fatal in such fast combat. I tried increasing virtual memory to 32GB, but it didn't help and actually dropped my FPS by 4, which was confusing. I then used GamePP Resource Scheduler to set the game process priority to Real-time and optimized memory weights. After this, frame times converged to 12-15ms per RTSS, voltage hit 1.36V per HWiNFO, and memory temps stabilized at 46-52℃ per AIDA64.