Priest Box, Scribe's box, and Princess's box locations (Dragonspine)

for the one with the Tree surrounded by water, you'll need to touch the Sword at the base of the tree to activate a time challenge with 3 Abyss Mages, 2 Cryo, 1 Hydro, 50 Seconds, The second box is at the top of the tower on the second image, For the last one you just need to place 3 Cecilas. Then proceed to this location- starting from the Statue of the Seven Hope this helps!