Hehe saw u posted up in official too.

With your current lineup its abit hard coz u are still using leo jugo combo which need to have hyral to support in order to sustain the battle longer.

Anyhow u will not see the true potential of your heroes unless they reach to orange fuse.

Well, what i can suggest is:

1) Leo, Blake, Medusa, Lumina, Noire. (leo increase blake's survivability)
2) Panda Jugo Raff Naomi Blazer (replace naomi and blazer once u have Oggie and gabriel up)
3) same.

Nowdays people don't use jugo any more, replace him once u got a Marina 4*.

To mash up ur epic line up is depend on your opponents. need to know what 3 common line up that your opponent use (usually can be found in top 50).
Either u build up the same team as they are or u build up counter team (need more experience by keep fighting them and find out which is the best against them)

medusa is very high dps for female dojo, but u need abyss silence and maybe some other supports to keep her alive.

also, i tried that combination, its very very very tough to pass mythical.. < 10%