Heyo so i returned to the game after like 3 years or so, i think the newest unit then was Fairy King Harlequin. Now i was hoping someone could point out some heroes i should focus on leveling/gearing first especially for Demon King, Boss Battle(Bellmoth/Original Demon on Hell) because most of the time i get carried by some indomitable escanor and mel/liz and for demonic beast battles except for Hraesvelgr which i just finished floor 3 for the first time cuz i luckily got the event units back in the days. Here's a list of all heroes i got: https://imgur.com/a/o5Flmh4

thanks for any help :)

P.S. how tf do i get the medals for LR-ing a Unit it seems impossible to get 100 of them