While this chart is helpful in thinking about priority wihin a rarity class, it doesn;t discuss choice between them. I’m going to shamelessly link my ideas about choosing between 4* and 5* heroes: Emblems on 4* rather than 5* - candidates?
My major reservation with any determinstic ordering is that it doesn’t consider how any individual player uses those heroes. In particular, buffing the war defense has a lot of merit—as well as trying to predict what your war defense will be once you’ve buffed a group of heroes. Hence my mullings about Classes and the defense meta .
I also think there’s merit in building a double-rainbow of emblemed heroes and variety in skills. None of your top picks are yellow, only one is purple. Both MN and Alberich are top, but how often will one use both? I haven’t even leveled MN yet, because (a) I have Alberich and (b) I drew Hatter, whomtook priority as my current green project. Kunchen is more likely to get my cleric emblems (TBD).