How to optimise loading time VR occulus, Single stereo

We have a project made for vr with single stereo rendering(long build times) and starting our app takes 4=5 minutes. We use
LightingGi, 140 megs light data asset, no light probes, no reflection probes, reflection for custom hdri, shadowmask shadows, hard shadows from one directional light, nondirectional gi,
Quality: AA 4x times MSAA. forced on anisotropic textures,

my stats with profiler opened