Photoshop post crop vignette

I don’t use Lightroom for cropping as I prefer to create a custom selection and invert to define the vignette area rather than use a regular shape like oval. I like the idea in the crop videos to use the shape tool and build different crop previews i one file. I would like to keep all the crops in one Photoshop file for ease of remembering. The problem is the vignette will be crop specific. I would like to see a lesson on vignettes and how to have multiple versions in one file to match different crops. A kind of post crop vignette but in Photoshop.