Yew longbows require level 40 ranged to use. They hit fairly hard, but are noticeably slower than shortbows.
They are predominantly used for money making. Casting high alchemy on a yew longbow gives 768gp. On average, a yew longbow costs 750gp, giving a nice 18gp profit per longbow. You get 75 fletching experience for stringing this.

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