You also need items from the weekly bosses to level up skills to 7+; it's not easy either.
Yesterday, I reached level 45. Just when I was getting used to the previous dungeons, I had to start all over again. But dungeons are different – for example, the one with the books by the lake in Liyue seemed easy; probably because it has Fatui agents, which I'm used to farming on the map. But the dungeon for Pyro artifacts, where you have to fight the mobs with ice and can't use electricity, is a pain. Especially considering that none of my Cryo characters are leveled up above 20.
And here's the best knight for good measure. I was hoping to get her from the standard banner, but I got a 5-star Falcon Sword instead. Well, I'll level up Bennett as a damage dealer or Keqing (maybe someday). And I'll save my guaranteed pull on the event for the goat girl.
To sell my soul