How do I stop unit movement lag during large-scale legion charges in Total War: Warhammer III?

I felt my heart rate spike when units started lagging mid-charge. I tried lowering shadows, but RTSS still showed 18.3-25.1ms frame times. I used GamePP Resource Scheduler to set texture priority to Real-time. AIDA64 confirmed VRAM stabilized at 68-73℃. Frame times dropped to 9.1-10.4ms, making the battle smooth again.