I pretty much have everything off or set to app controlled...except...
Power Management Mode: Prefer Max Perf.
Shader Cache: On
Texture Filtering - Neg LOD Bias: Clamp
Texture Filtering - Quality: High Performance
Texture Filtering - Trilinear Optimization: On
V-Sync: Fast
Pre-rendered frames: 3
Most of these I found by testing playing around so I don't have any reasoning/evidence to support why it works. Figured I'd share since like you I have been searching and playing trying find the best settings for the quest 2.