This part isn't too bad if you have the right strategy. First head to a caved in spot to the left of the waterfall. This is your safe area. Next summon your level 5 dragon friend. Once it looks clear run out and fire 1 fireball at a nest then immediately run back to the safe spot. Continue to resumon your dragon friend and continue this process. Save after you kill each nest. Once you killed 3 nests race for the portal. It's impossible to kill everything you only have to make it to the portal a short distance ahead to move on. The butterfly spell is useful too if enemies get to near. Shield is useless imo.
