This is one of "harder" encounters ...

Your ass will get wiped hard, if you just run towards them with whole group ... sometimes even at level 4. laugh
BUT!
If you try to prepare a bit with hiding ranged companions on that cliff, and will not be cheap on potions, special arrows and spellslots ... it quite fast become close to mid-rated threat. laugh

I still dont understand why cant we change Race for our hirelings. frown
Lets us play Githyanki as racist as they trully are! frown