Depending on your build, there are a few things you can try.
The minotaur labyrinth should be doable, maybe not totally clearable, but deep runs.
I enjoyed clearing two dungeons at this point: Gorx lair (N.W. Sagar Forest) and Urzaganars Lair (W side of S. Bluemist). Good amount of loot and enemies, with the bonus of running between the two takes you past red and blue orchid spawns, and through Lannegar to cash them in for med. potions. Stockpile these so you can use them freely when trying harder dungeons, like Jabal Grotto.