Hello Steve! Welcome to the Ironworks!
When fighting mindflayers (illithid) use the fifth level priest spell "Chaotic Commands". This will portect you from their stunning attack, and makes the whole job a lot easier.
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Within the jungle of my deepest emotion,
With a coat resplendant in a golden sheen,
Swiftly hunting my tender love,
Stalks the regal, Feline Queen