[Arryn]

Originally posted by Bowlingballhead:
Actually, I think Rl'yeh's biggest weakness is more subtle. Illithids have a huge upkeep cost. This is far more devastating than their initial purchase cost. You just can't maintain a very large army of them, and the more you buy, the less you're able to buy in the future. They're a gigantic money-sink.

Very true. Which is why a major squid strategy is to aim for rapid conquest of river provinces with their high-income farmlands.

Their least-subtle weaknesses are versus flyers (illithids die quickly when engaged in melee) and arrows (as Zen pointed out long ago in this thread).