well I've gotten all the way to level 12 with a summoner fighter/geo tank fighter/aero/hydro tank and a ranger I mostly just used smart tactics; ie don't forget you can run away and come back after you kill one and even go run heal and join the fight mid battle haha, I love the new respect cause you can fine tune your build and get rid of points you used to survive early game only real fight I had trouble with was the end of 1 act on the boat going to act 2