Hello Dear Mograph-Folks,
I have just released my new Tool RegionKing. RegionKing helps with the process of Shading/Ligthing and Rendering. You can define a RenderRegion in the Viewport and send them to the Renderqueue with one Click. Later you can recover any State of your Scene after you have choosen the best Version. Very unique and fast Workflows are possible with this little nifty tool.
I hope you find it usefull.