How do I stop combat stutters in Kingdom Come II?

Summoning units caused bad stutters when SLC cache filled. I tried increasing virtual memory, which made read/write conflicts worse. I used GamePP NVMe Queue Depth Configuration to raise depth to 2048. CrystalDiskMark showed 4K random reads improving from 42-48MB/s to 65-72MB/s, and load times dropped from 10s to 4s.