Quote Originally Posted by Wadoka View Post
A true archetype of an Arcanist would be able to accelerate the corruption, corrosion, decay of practically anything subject to Entropy. This could include massive structures, like the walls of Ul'dah.

A powerful Arcanist would be a siege weapon without parallel.
Most magic wielders would be like gods to any but a magic user if it was taken into a realistic situation. Look at your city walls example. A Thaumaturge could freeze the walls then flash thaw them creating thermal stress that would make them so brittle that a 90lbs weakling could tap on them and shatter them.