Normal maps don’t have a real depth effect in VR. Try to make your test level as simple as possible. Take out as much as you can. Just playerstart and static skylight.
But usually using the FPS template should already work out of the box with 60 FPS. The counter usually shows 59-60, it’s never constant, though.
You get the panel with Window -> Developer Tools -> Device Profiles -> Android. There you can add those variables.
To reply to another thread from you: Dynamic shadows from directional lights only work with HDR enabled, unfortunately. I hope there is a fix for this in 4.11.
Getting fog on mobile with LDR set up for UE4 is indeed a bit more complicated.
This is a material for very simple vertex fog. All your materials would need this set up:
