I just gave you base numbers, 10% tax rate, 100% production, 7 day tax collection period. Some of those regions have only 2 knights, and could support a third; others have 3 knights and really should get rid of one. And our priestess certainly doesn't need much gold.
The point is, we don't "need" more knights. So there are indeed realms that don't "need" knights for full coverage.
On the other hand, the other 3 realms I'm playing in do have a need for knights to varying degrees.
You don't need more knights in terms of estate coverage, but more knights is always great for the military. Remember 2 knights with 20 troops are generally better then 1 knight with 40 troops.
