I think the main concern is Dwilight. It is a huge continent. I think that there are really two options.
1. A realms reach, even when using mercenaries, is limited as intended and nothing needs to change.
2. A realm on Dwilight should have greater reach and the numbers need to be tweaked to mercenaries will allow it.
It really comes down to what feel we want. Perhaps historical precedence could help decide? How far could an army effectively reach in this time period?
