I would spend the most time on...
Path
Phys
Pharm.
I'm starting out with studying the highest-yield stuff first and then saving the lowest yield for the days before the exam. One of my good friends started studying early enough so that he could do high yield areas in the beginning, low yield towards the middle, and some more high yield towards the end.
His schedule actually makes a lot of sense, but since I don't consider the high yield areas my strongest subjects I figured it'd be best to do them first rather than save them for last.