I see conjurer as becoming the White Mage personally, it has the largest arsenal of healing and support type abilities (Cure I-III, Protect, Shell, Poisona, Silena, Paralyna) and as Cairdeas mentioned before, the names we see aren't even in the Japanese version, they are called things like "Sword user" etc. I could be wrong, though I personally hope it turns out to be the White Mage. When I started FFXIV, I leveled Conjurer first due to the fact it had the spells I listed above, as I wanted to be a healer as my main role.