Well, in that case:
1) Magic (through an additional medal) + Festival
2) Agility, enhancements, base spells, defensive gear
3) Competitive (as a spectator, I guess) + Magic (through an additional medal)
4) Endurance
If you also need to spend a point on the Festival, then I'll probably switch it from the third week instead of Magic.
Team for the Competitive event: Linnea, Ifeon, Ely, Parfynora, Larto, Bert, Xenomia, Light.
/maybe I'll skip Strength for now, it seems to have leveled up once already. I think I'll visit the other red training grounds. Is Endurance leveled up in the same way, or what?