I send my useless heirs off to a remote Rebel province with no support.

Sometimes the results are funny. This afternoon I sent the prince regent off to Norway to die. He was RK-late version with armour and weapon upgrades.

20 RKs killed almost 200 vikings/FS in personal combat. The prince regent survived, so next turn I sent him back to Norway (alone) and autocalc. the result.
Got rid of the schmuck eventually. Plus its great to see how good late RKs really are...:)