Not really. I constantly take breaks between stages. A time limit only applies in raids - multiplayer content. Once you've cleared a stage and are at the start of the next one, you can even close the game and come back much later.Thankfully this problem was solved like a year ago. Just do 8AP daily quests until you see a 100% in your list - and this doesn't need to be from a friend either. Hraes is the most important one to friend, really. Anyway, this list persists until you next start something, so there's no real rush - you're just blocked from doing something else.