Hi Steeriks,
First off, just to make sure that you are aware of how the Oculus renders. The Oculus will automatically half the FPS that you see in the editor because the frames render separately for each eye. So let’s say that you want 60 FPS in the Oculus, you will need to make sure that you’re packaged game plays at 120 FPS or higher.
Now, since your game is playing at 200+ FPS this makes me think that more ‘Oculus friendly’ optimization is needed. Are you using any sort of LOD’s for the trees and rocks? If not, using proper LOD’s should increase your FPS.