Hey just started this game and I love it so far! I'm leveling up an Arcanist right now eventually to be a Summoner.

Do I put all of my attribute points into Intelligence or should I put some into Vitality as well? If I go straight Intelligence will I be like one shot all the time or do I gain adequate HP as I level? Is Vitality just a tanking stat similar to Stamina in WoW? SO MANY QUESTIONS

Thanks