Which level 5 monster is the best?

Dig around, there's a universal creature transformation spell, and then you can just upgrade Royal Elves. =) And what prevents you from defeating a 7th-level Gorgon? In a battle, 200 Might Gorgons won against 10 Azure Gorgons, and they even took down 4 dragons at once! Strength lies in valor! The Gorgons have plenty of it. :)