Challenges 3 and 4 for the Battlefront: Misty Dungeon Challenge is now unlocked. One melee focused challenge and one ranged focused challenge. So building teams around those challenges. My main concern was the ranged challenge, considering I built the trail team based on range characters and mage characters.
Next Genshin broadcast: Battlefront: Misty Dungeon Event Challenges 5 and 6, considering this the event finale unless they add a surprise challenge for the event.