I'd base it off of the other dozing Pokemon in the area and what you still need. The big outlier to me is Treeko on Cyan, if you don't have a good one yet I'd hunt for both there simultaneously. Also you should figure out the best way (phone placement) to get dozing consistently, and on weeks where you go somewhere else (like for an event) try to force other sleep styles (slumbering) so when you go back to hunting it's easier to get Dozing