When only mastered heroes are taken into consideration:
Since Heroesprofile doesn’t register hero levels like in other leagues, I’ve done it by hand. As we know and can see, safe poke and sustain are king.
Stat taken from HP Aram and hero difficulty. Very hard gives 6% WR while easy takes away 3% WR. I’ve made minor adjustments on some heroes like Sonya to reflect her good talents.
I’d put Probius, Maiev, Medivh and Hanzo higher, but since they lack sustain and safe poke as a whole, they get less value than expected when put on a random draft.