You could try using some heuristic to place more probes where it matters. For example you could use navmesh or height above ground.
what if my player can fly ?
i would not want to be in any constraints because of LP..
i guess i have to throw LP away and perform raytracing with sky on CPU (just rays - top/left/right/forward/backward) for every object that is moving , to learn if object is under indirect lighting or not..
just occlusion factor = 5results/5 = 0...1