I reccommend using a Totemic Druid(the one with the spirit animals) I ahve finished the game twice with my one and at L26 he can summon 6 a day. They can help you out a whole lot in the game especially against mind flayers
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"I was born of darkness. My fathers eyes closed before mine opened. I am not of this world or the other, and I have the right to be what I am..."