Loki Familia.
If you think about it, the Loki Familia has far greater potential than the Freya Familia, excluding Ottar. They’re much stronger when it comes to Skills and magic—Hati, Tir na Nog, Vas Windheim, and Ariel are all incredibly powerful, and even the twins have very strong Skills. Meanwhile, the Freya Familia relies mostly on pure combat skill. Hogni and Hedin don’t have truly outstanding magic, the Gulliver brothers don’t have anything particularly broken besides their teamwork, and while you could argue that Ottar and Allen have strong magic, it still doesn’t compare to Tir na Nog or Hati. In the end, what really carries the Freya Familia is their higher levels. Now I understand why the Loki Familia and the Freya Familia were considered equals even when Bete, Ais, and the twins were only Level 5.