Yeah, took over the Norwegian Crovan family, (Duchy of the Isles). Thankfully my wife (Princess of Norway) gave me claims on both Norway and England(whom i helped Norway alot to gain!) (Explaining how i got England!)
Anyway, had just taken 1-2 counties (Dublin, so the Norwegian population didn't turn Irish!) Then my Court Chaplain discovered the teachings of Fraticelli. Now, i've been bored of this game for quite a while, so i thought, hell why not something different.
The ''Holy War'' casus belli, was really handy, and i must have had constant wars for about 50 years(attack is the greatest defense), to keep my flow of cash high enough to keep my merchaneries (who just became more numerous as time went by!)
The tactic was to unify Ireland/Wales, when England/Scotland was busy with a war. And then take a large part of Scotland when my army was strong enough. Worked out well, after all i took all the isles, (and took Britanny as well.) Then i turned my son into a welsh(poor kid, and future me that had to handle revolts from EVERYONE!), and when he inheritaged, i made the Britannic Empire. (And kingdom of Wales and Britanny, that i can't give away for some weird reason)
Now... something unforseen came up, i simply did not expect this. The pope, the 67 year old Zealous, gluttonous, shy, slothful and infirm scholar... waged a crusade on England! (Luckily in the middle of a large civil war in HRE!) (as if handling the holy orders in any normal war wasn't annoying enough!)
I'm honestly slightly impressed with everything, and i hope and feel, that it will not take too long until they overhaul the heretics system. (+ divorcing your wife for free, is AWESOME!) (Forgot to mention, this is on Very Hard!)