De-incentivize PvP and incentivize RvR (direct the player base into completing more realm oriented objectives):
There are scores of others games that have PvP progression systems, if that is your forte. For the realm(s)!
- Significant diminishing returns on realm points for repeat kills in gate zones on a timer; players are still free to PvP if that is what they wish, but will not be awarded "realm points", as these activities aren't conducive to the realm.
- Immunity from this rule in the proximity of the border keeps.
- Defenders are immune to this rule. They're fighting an incursion into their frontier areas and should be rewarded, where ever they may be.
- Whereas, invaders need to have an productive objective in mind when they enter an enemy frontier. So either they fight for the border keep, or they push deeper into enemy frontier lands.
- Task areas immune to this rule, if you decide to keep them.
- Perhaps, once the invaders have enough of a foothold in an enemy frontier (say they own the majority of the keeps), this rule can be disabled.
- Make keeps and kills within the proximity of an objective especially rewarding; more rewarding than some random skirmish.
There are scores of others games that have PvP progression systems, if that is your forte. For the realm(s)!