The mind flayers are about the only thing I find difficult now. I just fought them with a party with no cleric, therefore no chaotic commands. They're just hard that they always stun you so easily. Shdow dragons no problem, Twisted rune was mildly annoying but not too bad. Shangalar was the only hard one there. I always try to use as few potions and wands as possible and reload if anyone dies so this tends to add a bit more challenge.
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