Which school of magic do you prefer and why?

For a long-term build, Earth is the most advantageous (city portal, explosion, mass slow), followed by Air (chain lightning, flight, spatial gates). Water is useful as support, especially for Warriors – it provides very valuable support (healing and removing enchantments, sometimes – clone and forgetfulness), but that’s about it. But for some reason, I like it the most. As for Fire, in my opinion, it’s the weakest element: among the decent spells, there’s only Berserk and Armageddon (other elements have even better spells at the first level), and the rest aren’t worth learning.