While Priestress offers the highest throughput, trained soldier offers more control, while only being slightly less powerful. Mark of Claw is less powerful than both others as long as you have not much time dpsing. If you have a lot of free time dpsing, Claw proccs more often and offers stats that help you healing AND dpsing.
While you can offer a rule of thumb, statweights depend a lot on circumstances, like raidsize, encounter, playstyle etc.
Rule of thumb from english discord for raids: Haste til your comfortable with your casting speed, rest evenly split among the other stats.