For a residence class visa application, INZ can (and should!) take into account any relevant information held about previous applications (see
R5.20.1(b)), so the idea definitely has merit.
I am in no position to tell you which option will ultimately be better.
EDIT: Something that you may wish to bear in mind is that most people on this forum who submit both applications simultaneously already hold a partnership-based Work Visa, and choose to submit a further partnership-based Work Visa application along with their Resident Visa application because they anticipate that their current Work Visa will expire before a decision is made on their Resident Visa application.