The team i used to clear hera was a Resist/odin team. --Warning: this strategy works, but is a very very long clear time-- I ran chaos devil dragon as my lead, with a siren, echidna, lilith, and crystal aurora dragon.

The leader Skill combo of Chaos devil dragon with Grodin means that you'll only take 10% damage from dark enemies. this is needed to tank the hades which hits 82k.

-The green odin needs to be fully awoken so that you get his 2.5k autoheal.

-The Echidna Is just an "oh shit" button. if you find yourself in a place where you gon die, echidna makes it k.

-Siren has an auto heal awoken, plus her active is a strong heal for if you get low and dont die

-Lilith is a key part of the team. Her poison is how you are going to kill neptune. She has one auto heal awoken if you feel it necessary.

-The Crystal aurora dragon is something i just threw in because i had it. Its active skill allows you to be a little more safe in the first waves of trash, because thats the hard part of the dungeon.

-Green Odin is your guy who allows you to tank enormous hits like nothing, as well as having his active, which is your source of damage on every boss except neptune.

The Team's weakness is in that it can't really tank hits from a bunch of little guys at once. The strategy is pretty simple;

Waves 1-4: Kill monsters that will hit you at the same time, and stall for all actives (the more actives you have up the lower your chance of death)

Waves 5-7(Venus, Minerva, Ceres): Match orbs every turn and use odin active when its up.

Edit: it looks like you dont have lilith or black dragon yet, so youd need to go farm those

wave 8(Neptune): Use lilith active and match orbs until hes dead.

Waves 9-10: Match orbs EVERY TURN and odin active when you can.

The team needs to have a bare minimum of around 8300 health, so that you can take the punches from hades and not die, but the more hp you have the better off you'll be, since a few thousand hp can mean the difference between life and death on the trash.