Ouch, got a bit further with this one at least!
Piatek's post about light res is spot on, it's the one to keep an eye on most in later difficulties, with fire being a close second.
Howl is your best friend out of tight scrapes, Leap is also good to get out of tight corners, and yeah rejuv pots are a good way to top up health emergency stylie.
Good luck on the next one, I'd stick with barb or the bear/wolf dudu, bigger health pool is more forgiving for mistakes
Good luck bro!