Quote Originally Posted by Malakhim View Post
But currently it is.

Although you guys are operating under the assumption that the devs didn't plan this out. It's quite possible they've been intending to add a caller class at some point with the lore as already established.
But "currently" means jack-shizzle. The game is being changed and things will be added in every single aspect. If the game populace wants summoner added in a traditional fashion it can and will be added in. Aside from that its clear even with our mundane ideas they could be added and the story could be modulated.