Since Riou stopped his version, I will give you this.
You do anything you can to damage the wall. You start with nothing but rocks on the ground.
Wall
1,000,000 HP
100 MP
Guards
None
Support
None
Turrets
None
Towers
None
Spells
Fireball (1 MP, 5 DMG)
Yes. the wall can use magic. You guys have 50 health right now.