I guess, but South america as a faction could work well. Let me explain why i said spellwarriors:
Considering the world is now a magocracy, the remmant south american countries have merged in one alliance. However, there's a huge cultural crash, and the minor schools of magic end up merging on a greater one, which actually works as the jack-of-all-trades. While being not especialized or especially powerful in any field, they have learned to use most magic styles. However, this is still limited. Because South american mages dont have acces to specialized magic, they train their bodies and augment them with runes, resulting in extremely agile and strong mages. They dont have greater strengths, but they dont have mayor flaws either. Their best companion is adaptability.