Volley after Volley

Lure Shieldsmasher to the bridge, sound the siren and destroy the Architect, then meet Stomp the Merciless in the Shore City harbor.

Me and Stomp have decided that our best strategy is to try and break into the city from two directions. Stomp will take his troopers to the harbor and will hold the fort. Meanwhile we have to handle the enemy on the other side of the river and near the city gates. There's just one problem... There is a huge Architect right behind this bridge. Arrows and spells just don't work against him. Maybe we should try artillery?
Will you take up this task? I knew you would. Take this siren. Lure the Architect to the bridge and then sound it - our cannoneers will take him out right away!

Huh, you're fast! I hope you're finished with the Architects on then river bank?

Huh! What was that sound? They are using our cannons, aren't they? I told them that their spells are useless!