Board Thread:Roleplaying/@comment-5262726-20150722204556/@comment-24696651-20150810094216

Accept the Empire's proposition, and request a detachment of forces to help defend Whiterun. Also ask for information regarding their armies (how large, composition, position, etc.)

Create some heavier, static ballistae which can be put on the towers.

Divert some water from the White River to turn the ditch into a moat. Add some barbed wire (or spikes if barbed wire isn't allowed) to crenelations to stop people climbing over them. Develop a system of pipes along the top of the tower that allow boiling oil to be transported around the top of the walls easily to burn any attackers.