Hi mmarsie,
To define the right value I open a subframe, open Cosmetic correction process, load dark master, enable hot and/or cold pixels, click in the real time preview at the bottom and move to QTY slider looking the real time preview window how bad pixels are corrected, and for potential artifacts, when I'm happy with the results I get this value and load the target frame with the add files and apply to all the subframes.
Antoine