Hey man,
you can actually use reflection captures together with the movable skylight and DFAO if you have upgraded to 4.4! The trick is to allow the reflection environment to capture from Diffuse. Normally it also needs Lightmass information, so if you have no Lightmass, the reflection environment is black. Back in the days you could just disable “reflection environment lightmap mixing”…but thats not working anymore.
So now, you have to type in “r.DiffusefromCapture 1” or put “r.DiffusefromCapture=1” into the ConsoleVariables to make it work with dynamic lighting. Note that it doe still not update in realtime during game though 
That would be neat 
Cheers!