I was having a lot of fun up until level 200, with my warrior at 250 max 330 max, my rogue at max max 160 max, and my wizard at 150 max max, and using an auto clicker to help heal, I'm still being one shotted by dragon. And yes I've turned off screen shake, numbers and finger.
I will debuff the dragons slightly in the next update. In meantime try to upgrade the familiar to his bigger variant in the new update i released today. Might not do much against dragons but still, all help is good..
You need to forge axe with damage higher than 75.