Bryce Crypt and Arval

I've been playing through NWN2 at a leisurely pace for the last four or five months and so far haven't had any major difficulty with the combat (playing on normal), until this fight. I'm level 11 and at this point wondering if I should go back to the main quest for a while to level up some more and come back to it.

Never mind. Changed my party make composition and wiped the floor with Arval. Qara is king (or queen or whatever).