I wouldn't advise it right now. Remember the families in the Isles are strongly inter-related. Age-old alliances are difficult to break. Your armies will not attack their own families. Taking lands by force will not gain you any loyalty.
Try to marry into a family of power and influence in the west. Your offspring will unite the Isles by their bloodlines. Such bonds are difficult to break.
Befriend those in power in the remaining lands. Once they are in your confidence, murder them and take over their positions.
Which card will you play?
