
Originally Posted by
Carados
You need to draw the fire away from those two units and overwhelm the defenders. Make sure you screen your heavy infantry with skirmishers and the like as you advance on the walls. Otherwise you risk exactly what happened to you - losing the vast majority of your combat infantry before they reach combat! Remember, your troops are at a seriously disadvantage in the early stages of an assault using ladders due to being totally outnumbered (each attacker has to deal with 4+ defenders). If you've taken damage already then the defenders will kill you faster than your assault can sustain. If you can, send a few units with ladders at other parts of the walls in order to spred the defenders thin.
As the others have said, mercenary hoplites are pretty good with walls too. Missile units aren't particularly good with dealing with stone walls I find, defenders have too much protection. You are best off flanking with them.