These aren't the main reasons why RDM is better than the other casters, though.
RDM is easier to execute, less punishing (no timers or anything) and synergizes with physical comps due to embolden.
Verraise and Vercure are cherries on top of the cake. Even without these, given their relatively high and consistent damage, lack of punishment by mechanic/transitions and attractive support for physical jobs, RDM would probably still beat them out.
Verraise is just the final punch to the gut (especially for poor SMN, who had a monopoly on that before, as far as dps jobs go).