I pretty much whent like this:

- Secure alliance with the french. (Marry Princess Constance to your heir.)
- Secure alliance with the polish. (Marry Princess Cecilia to their heir.)
- Get trade rights with spain and portugal. Trade maps with Moors. (Diplomat 1)
- Get trade rights with HRE, Milan, Venice and Sicily. Make alliance with papacy (Diplomat 2)
1. Take rebel settlements form brittain and north european coast.
- York, Caernavon, Dublin (Army 1)
- Rennes, Brugges, Antwerp (Army 2)
2. Exterminate Scottish and keep french and papacy happy with coin.
- Go straight for Edinburgh and their heirs. (Army 1)
3. Exterminate Danish and keep french and papacy happy with coin.
- Go straight to Aarhus and their heirs. (Army 1 and 2)
4. Participate on the 1st Crusade. (Army 3)
- On the way to there take the two islands west of italy and the african castle (carthago).
- If you manage to get to Jerusalem, burn it to the ground and give it to papacy.
- After that take the island west of antioch. (Bysantines)
5. If Florence, Oslo, Stockholm, Helsinki or Vilna is still rebel, take em. (Army 1 and 2)

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At this point you have:
Brittain with two major cities, two smaller cities and 3 castles.
North coast of europe with 2 major cities, 1 smaller city and 1 castle.
Scandinavia with 1 major city, 1 small city and 1 castle.
Mediterrain with 3 small island cities. (They are castles at first but change them).
One castle in the middle of african coast.

- So basicly you have secure income by farming alone and quite a lot of trade income. On top of that you have possibility of naval dominance in brittain and scandinavia, naval presence in mediterraen, lauchpoint to attack russians with allies, lauchpoint to attack HRE with 2 allies, lauchpoint to attack moors weak spots, lauchpoint to attack italian pennisula.
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At this point I quitted playing but after quick calculations I think I would have attacked Moors, then HRE, then papacy and the italian states... And get ready for the mongol brawl in constanttinopole.

Mayby I start a new one to try it :)