Hey Enzo,
It would be risky putting 2 angel fish in the same tank. Even tho they are both Dwarf Angels, they will still fight with each other. Another prob I see is the damsel. The Blue Devil Damsel has well earned it name. Most Damsels are territorial and pester and pick on other fish, regardless of size. The Yellow tailed Damsel seems to be the most calm of the Damsels.
I have a Yellow Tail in my tank and so far , he has been pretty nice to the rest of his tankmates. They are as follows... Coral Beauty,Percula Clown,Yellow watchmen goby,Scooter blenny,Firefish and a Yellow Tang...along with my Yellow tail..... so far ,so good.
But like I said earlier.... it would be risky to put 2 angels in the same tank.
Good Luck!!*SUNSMILE*