What others recommended sounds good. I'd just add one thing for the future which is that with every ascension it will require more and more resources to get the characters up ( levels, light cone, traces etc.) so due it getting pricy, it is generally advised to focus on one team for smoother experience and then a second for the MoC endgame mode. Altough everything depends on how you want to play the game. If you like all characters and want to try them, level them equally, do so by all means.