If you want a descent to VMC under rdr you want to go straight down to the minimum the controller can provide.
provide.
An idea of the cloudbase will determine whether it's worth vectoring to a lower area. Proximity to significant terrain is also an issue because in some areas that vector could result in several 1000' difference and in flat areas only a few 100'.
Reduced traffic shouldn't be an issue unless there is someone else IMC below MSA/SALT in your area not talking to anyone.
Hope this is useful.