Sieges - defending M&M: Heroes VI Guide

If we are defenders our goals won't be very different from tactic we use on the open battlefield - but we should act even more defensive. Usually is good to start from putting shooter on the tower which is in the middle of our fortress (only if we have built walls). Next we should secure all non-melee troops by surrounding them with other units. There is not many of area attacks, so we shouldn't worry about what happened after gathering our forces in one place.

Fire, fire, fire!

Very important thing is leaving the toughest unit (or better - units) near to the gate - usually this place enemy attacks with all power. His behavior is logical - walls are very resistant, and destroying them take much time for an enemy's catapult. Even when the fortifications get crushed, enemy's charge stop for at least a turn in a moat - that's why very rarely castle can be conquered in other way than through the gates.

So we should keep gates as long as possible, or at least stop enemy in entrance. If attacker has flying units, he'll probably try to move over our walls and attack our shooters - that's why we should surround them by own units. But when enemy however fly into our castle, it will be sure death - our troops eliminate flying creatures easily.

Hero's strikes and abilities can win a battle for us

But what to do if we made a mistake, and there are no shooters in our castle? If enemy doesn't have strong shooters, we should keep our tactic and move out from a castle only after eliminating his melee units. But if there are shooters, we are in troubles. They lose lot of their power because of walls, but still it's dangerous. In that situation the best way is defending in safe places and, if there shows any opportunity, attacks enemy's shooters.