Tactics for Rampart.

In general, the most effective school of magic is probably water magic. You don't really need to besiege a computer-controlled opponent in their castle (or if you do, it's still easy because the computer sends its units out of the castle walls). I understood what ballistics means while playing the 4th scenario of the campaign for the Swamp faction in Armageddon's Blade. Earthquake as a spell is useless. It's rarely used, and there are more versatile spells. With equal armies and heroes, the defender in the castle naturally has an advantage. However, you can take advantage of the fact that the enemy is waiting in the castle and level up your hero to gain complete superiority over the enemy. In my opinion, Towers are very bad for besieging castles...