Hi, I'm on lvl34 and have the following quests
1) how clean is your library (6/10 books, already have one dragon from the pyre quest)
2) enchanted minerals
3) cave rich in culture (building the fairie respite)
4) one more time (upgrading the troll castle)
Almost got 10 Mithril - what should I use them first on; number 2 or 3?