Update. I have tried a few new things and they worked. Now getting 35-45 smooth FPS in Caucasus even when dropping a pair of CBU-97s. I removed MSI Afterburner and Riva Statistics, turns out the Zotac 3060 TI OC card standard advertised boost clock of 1695 MHz will actually go to 1920 if well cooled (65-75C) using a program called fan control to run the GPU fans on a custom curve. 75 % RPM at 70C, I'd rather buy fans than cook my card. The Zotac will boost until it hits the voltage limits in the VBIOS. Second, I use Process Lasso and set CPU priority always for DCS, Virtual Desktop and Steam to high. Probalance and high performance on. Restricted DCS to physical cores only. Panjno on Youtube has great videos on how to set this up. Finally two things I got from posts in this thread. Turned off audio streaming in Virtual Desktop and used separate headphones from the PC and changed the registry " Set HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenXR\1\ActiveRuntime to None" thanks Hillman! So starting DCS from the VD tray icon using bin_mt.exe starts in Oculus runtime now, no Steam VR.
Pnguin9999's post in Worse with MT in VR, better on 3 screens. was marked as the answer