if you got the 50$ pack and a stat reset potion you may as well go full int (you dont need con in order to clear the grinding content - especially if you play in a party) after that you can try a few pvp rounds check how well youre doing on full int - also do a couple end game dungeon runs and then decide
You have to put points into con or you get 1 shot by mobs.
You won’t have a tank for grinding/doing quests (for most people), the ranged mobs in the game are pretty nasty and are able to 1 hit k.o. a full int wiz.