I don't find int mage all that squishy, combined with the right buffs, they have almost as much armor as a bear, the most squishiest class in my opinion are archers now as their dodge buff (their only defensive buff) has been nerfed to the point where dodge won't really help them, and they don't get an armor buff to their already weak armor, so you might as well take their last defensive buff off too because it hardly helps if you compare it to other classes such as the bear and elf.