Miki ASAP, he is best titan hero in the game, he is also very usefull in v.fast tournaments/wars.
Domitia is nice hero to have if you are missing Seshat, Aeron isn’t really worth feeders especially since you have Agrafena.
Chakkoszrot is usefull but not priority.
Joon and Devana are both great, yellow 4* are missing firepower so I would take Joon to 3^70 before Devana and probably max him first.
Glenda is also really good hero, she worth maxing but she stays far in queue right now.
Esme is good against fienda summoners but except that she isn’t amazing, Rigard is better if there are no fiends. But she is worth to take to 3^70 at some point in order to have backup healer for towers or wars but she isn’t priority.