Everyone knows if Square were to add another caster job now the Summoner job would be destroyed because a lot of casters overshadow the Summoner even the Black Mage over shadows the Summoner now what will happen when they add the Red Mag the Summoner population would dwindle to nothing. Square can't even add another caster job without killing the Summoner unless they make the Summoner more about summoning. The Arcanist is a channeling class but it dosen't seem like it's channelling much of anything when most people think of channeling they think of witches that can affect the weather the atmosphere and call forth storms , intense winds, earth quakes and he'll fire.