I just use Dynamic Lighting with LPV + DFAO - Never have to bake a lightmap for anything, and works great for me in large scenes (I have a gtx 660 ti currently), even the more demanding scenes (LandscapeMountains demo) I get 40+ fps. usually 60. The performance hit of Dynamic lights in an outdoor environment is very minimal, plus you don’t need to rebuild, personally I will be using dynamic for all outdoor scenes in my game.