Lord Blekinge: That's definitely an option, although it would require three revolts at the least (Tripoli, Tortosa and Tiberias), since only one title may be revoked per revolt without a reputation penalty. Also, I'm not sure but I think dukes who lose their last county can take one away from a vassal count. I saw it happen in Scotland. If that's the case, I'd have to find a way to get Beirut and Tyre/Sidon away from him as well, because they're his vassals. Provoking a revolt is a good way to weaken a strong vassal, but I don't think it would finish him off.