Then we can tell people when to change their party and use more powerful characters
To make one ranking is already hard work, i don't think anyone would commit to make numerous rankings for several points of game. I'm willing to evaluate characters at their lv 60 which means at late game stage though.
By the way... you didn't mention unites your criteria, in term of effectiveness, unites are dmg modifiers and i wonder why people always tend to ignore it? Because it takes more party slots so they can't use all their favorite characters, perhaps? I'll test soon to make sure of unites nature if it allows critical hit and/or multi strike.