Sounds good.
Make sure r.ScreenPercentage is 100(input into console while play in editor, doesn’t save).
With your GPU that shouldn’t be an issue for 60fps@1080p. This will integer scale with your monitor which is good for finding artifacts.
As for shadows try seeing is CSM will work out better noise wise(you should also get a perf gain), turn down contact shadows in your lights since this is a terrible shader that relies on jittering.
As for the noise from the lighting, I and others have repeated asked the Lumen devs to un-tie TAA/TSR to Lumen(I suggest you do the same). Unfortunately, I have no advice on that other than turning off shortrange ao and allow SSAO for Lumen. Then turn on the non-TAA dependent SSAO.
Maybe increase the radiance cache grid to stop a little noise, I don’t think that hits perf to much.