I was thinking about special realm benefits.
As Alsius wants to expand their territory they have to gamble, force alliances and stuff like that.
Alsius should be able to talk with every other realm, and make alliances with clans or groups of players from other realms.
Syrtis should have another benefit that suits their story, maybe a very good protection spell ?
Ignis should also have something.
Maybe they could have some kind of rage unleashed when a group of 8 players was in a party...
I don't know, this is only examples, but I really like the Alsius one.
Please come up with different ideas.