I could be totally wrong, but fleeting quiver seems to affect only your ranged haste, so it would be pretty savage if you had that, and a worn haste, and a spell haste lol.
BTW, there's a shaman potion which does a 5 minute haste that's pretty freaking strong. I use it on filbus because i'd rather drop a few hundo plat than camp stormfeather. And with a fast bow, like even bow of the huntsman, you'll be peeling off insane damage.
Finally, your ranged attacks have no damage caps at low level
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this is a big deal lol.