I'm new to this game and Arcanist was my first class. Some of the Summoner job quests were difficult to face tank, but overall leveling wasn't that bad. It just feels kind of slow and squishy compared to leveling something like a melee DPS. Even though Arcanist is not a healer Physick is still really useful in those early levels; a lot of people probably don't think to use it but you can heal through a lot with it.