Set OpenXR to Custom Resolution, but leave it at 100%.
Set your HP G2 to 60hz in WMR with Best Quality Resolution.
Leave the in game resolution at 100%.
Turn down the input sensitivity in the OpenXR Toolkit.
Using the OpenXR Toolkit, set the NIS or FSR scaling to 65% with 15% Sharpening.
If you are still not getting the best results, turn on Foveated Rendering Preset Performance in the OpenXR Toolkit.