I'm surprised they've got such a poor track record.
In general they chose poor realms, kept themselves apart, acted extremely arrogant in all their dealings with other realms, and then proceeded to viciously antagonize and insult their neighbors. The results were ridiculously predictable.
To be fair, they didn't really "take over" Thulsoma in the sense of moving in and kicking out the prior occupants. Thulsoma had been abandoned due to overwhelming monster attacks, and was on the verge of disappearing completely. I'm not sure there was anyone left in Thulsoma at all when Haruka showed up. The realm was in Anarchy and she was auto-selected as the new ruler. (Or however that anarchy thing works. I've never been in a realm in anarchy before.) That's when the Saxons showed up. They rescued the nearly dead realm and brought it back to flourishing. It wasn't until much later that anyone suspected how the family gold loophole was being exploited. Without it, there would have been no chance at all for the realm to come back.
