Currently progressing through an event after finishing a hidden quest

I finished the Taeo growth event with Taeo's exclusive weapon equipped. There are also missions for Rachel's exclusive weapon. For exclusive weapons, the enhancement and tuning costs, starting from ultimate enhancement, are extremely high. I did manage to recover them with the currency I received, though.. It's fortunate that the exclusive weapon selection ticket and 6-star ring selection ticket in my inventory haven't been used yet. Following the mission to clear the world map, I heard that farming low-level mobs (jjoljak) in higher-level areas yields better rewards, so I kept pushing. This led me to complete the Taeo event and unlock the Nightmare map. That map requires 10 heroes in two teams and has a high difficulty. It seems like a place you go when you have a lot more heroes. For jjoljak, I've set it to automatically run if I'm not on the map, and I'm currently running it with Taeo on 14-1. For raids, I somehow managed to clear it until a 6-star weapon dropped, and now I'm running 3x auto-farm. This quickly depletes my keys, so I'm buying up to 80 rubies daily. I barely cleared raid stage 8. There's a mission to clear up to stage 10, so I'll likely continue. I'm not very good at the game, so reaching my goals takes time, but it's a game that gives a sense of accomplishment and is fun. I pulled a lot of heroes just to try out Gems, but I regret not checking the tier list first.