What is it, specifically, that you think you need in order to better optimize your project?
Lumen has probably over a hundred cvars exposed that allow you to control everything from the downsampling factor of screen probes, the placement and resolution of the radiance cache, the resolution of the surface cache cards, the density of the translucent lighting volume probes, whether to do spatial filtering between radiance probes… the list goes on and on… Individual components of lumen can be enabled/disabled wholesale even.