In your previous screenshots you can see, that your frame time is around 44.3 ms (~22 / 23 fps). Most of which is taken up by the Base ~4.6 ms (~10% of the frame time), RenderDefferredLighting ~14.1 ms (~32%), Post Processing ~6.5 ms (~15%), Shadow Depths ~5.7 ms (~13%) passes which take up around 31 ms and more than two thirds of your frame time. All those should be your first few starting points to save gpu time, because those are the most significant and probably have the biggest possible savings in terms of gpu time.
I’m sorry but I don’t quite understand what you mean by your last sentence.