
Originally Posted by
Comradebot
First thing's first: Alliances, and making the HRE love you. Preferably, ally with them... the AI doesn't like to take the prestige hit for declaring war on an ally. But getting people on your side and keeping the HRE off your back is priority one. They can and will press their claims on you when they have nothing else to do. While you might be able to wait out the strong claims they got when you first gained your independence, they will ALWAYS (as obnoxious as it is), have de jure claims on each county in Bohemia.
While I wouldn't rely on the Pagans to still be around to weaken Poland, Poland is still a good place to look. They're the only other West Slavic kingdom around, so your people tend to be a little close to one another. If you can, try to inherit and merge yall's thrones. If you're going to continue to be independent from the HRE, your first step will be to get land they have no claim on. But look to Poland and Hungary for potential annexation for your new kingdom. If you leave vassal Dukes and Counts on their borders, they'll typically fabricate claims you can press for em' whenever the target country is too distracted to deal with you. But obviously that might conflict with trying to ally and inherit, so pick and choose based on the situation. There's little reason to fight a war for a single county in western Hungary if you could instead marry your eldest son to a young female Duchess that has that same county.
And when you get big enough and no longer have to hid behind allies, start looking for opportunities to strike at the HRE and chop them down block by block. Bad HRE succession? Do your part by helping some of their vassals win their independence. It'll give you a nice buffer zone if you can pull out the ones between you and the HRE, and every county and duchy they lose is less and less manpower they can muster to go slap Bohemia around.
Tell me how it goes, this is more or less the strategy I have in mind with my current game as the newly crowned King of Pomerania. I want my de jure land out of the Empire, and after that I'd be more than happy to book it.