Looking for recommendations from veterans!

Slurp! If it's for the story, building around Rachel and Ace would be a meticulous choice. Even though they're free heroes, their defense reduction ability is outstanding, making them highly efficient, so keep that in mind! If you want stability, forming a party with Evan or Vanessa would also be a benevolent strategy, hmm!

I haven't tried it, so I don't know~ I should probably start playing it.

Teo seems like a must-have in the current meta. I'm not sure about Teo and Freya, one of them I'll have to log in to find out, but for now, this is my setup.

If you're free-to-play, it's probably a classic. I'm not a veteran player myself. If you're a returning player, you can check character stats and recruit accordingly. The new characters, Seonyeon and Hayeon sisters, are popular.

I saw who Seon-yeon was, and it turned out to be Seon-ran, so I'm trying to get it!

Seollan and Yun-geon's decks are quite popular. I don't know much myself, but you could probably watch Moobing's YouTube videos too.

For quests, Theo and a healer/tank are enough. To push through Nightmare, people usually use Yun-geon, Freyja, Seon-ran, and Theo. For other content, a buffer and debuffer feel essential.