In my current HRE early campaign I have to reïreinforce Friesland fast. So I'm forced to take on Denmark as I can then move most of my units in Saxony, Norway and Sweden (bribed Rebels in both Scandinavian countries). As I wasn't prepared for such an action I don't have the appropriate units to face the Danish king and his family.

The danes have 321 men. 101 royal knights (5 units king included), 100 spearmen, 60 vikings and 60 landsmen.
My force is more than 4 times as big, above 1300 troops. A walk in the park wasn't it for the fact that they are mostly shock troops and that I want to end up with a still seizable force. I have 100 spearmen, 40 mounted crossbows, 20 royal knights (general), 60 archers, 60 slav javelin men and then a mass of vikings, landsmen and slav warriors.

I will win no doubt about it but as I said my force has to be battle ready the moment they slayed the Danes.

I was thinking about letting my archers and mounted Xbows concentrate on the king. He doesn't have heirs yet so the Danes will turn rebel and I don't have to worry about the siege so much, besides this will mean that the rest will rout faster and more of my men will be spared.
To face their army I'll divide the rest of my force in 5 groups (=> 5 knight units). I need to split the Danes in order to benefit as much as possible from my my superior numbers and if they don't split up I can at least swarm them from all sides. The groups will use the 'hammer and anvil' tactic with a landsmen in three or four ranks ( one group will have spearmen) and two other units that will do the flanking. The javelin unit will also hit the pinned knights and my general will help where needed or charge in the back so the men will rout quicker.
I didn't forget about the Danish lands- and spearmen but the group that will be attacked by it will hold long enough for help to arrive.

Are there any better suggestions as I'm well aware the plan is far from perfect.