Global Illumination alternatives

Sorry if i put this here, but since i started learning ue4, and now reading this thread i’m lost with all the GI solutions.

Simply, when i launch the 1st person template, and hit Build, what method do i use? Lightmass GI? (Here when it goes over my available Ram, the comp freezes)
I’m reading a lot about every aspect of the engine, but could someone summarize what are the differences between Lightmass GI, LPV, DFGI, VXGI, where are they, when/why should i use one or the other? Are they dependant on the used lights types (static/movable)?

Thanks in advance