Attack Edward in the heart of his kingdom. It's a long way, but it'd be worth it to see his surprise as you stormed his castle in London.
Bribe some of the English officials into joining your cause. You need some support and this option will give you some momentum.
Attack the many stone garrisons and fortresses of the English army up and down the land. You need to show them what the Scots are made of.
Which card will you play?