There's nothing really "wrong" with this build. If you go and look at some of the other threads, you'll see some decent explanations by myself and others (synesthetic's posts come to mind) as to why this is the case. I think it's kind of hard to F up a Ranger build-wise. Where Rangers go wrong is in their execution (in parties and raids particularly).
Any skill path for Rangers, be it max Arrow Vulcan, max Falcons, or a hybrid, will do some hefty DPS. As Quzar said, Falcons tear
up in burst DPS, whereas Arrow Vulcan can be used more often. However, in my experience, Arrow Vulcan is best when you have a higher Crit Rate. In other versions, a max AV without a Crit was weak compared to a critted Charge Arrow. The fact that I can use Charge Arrow indefinitely (without having to build up Fear Breeze + hope for a Crit) made me disappointed in Arrow Vulcan. That said, if you do beef up your Crit Rate, the worth of Arrow Vulcan raises a f-ton, since each arrow fired during the skill has its own chance to Crit.
If you follow the AV path, there is less incentive to get Camo, since you can't use AV while invisible. However, you do get 2x damage on your first hit while invisible. For that reason alone, I would get it. Consider taking off that point in Arrow Shower, Rangers' AoEs are a joke; in parties and raids, you're rarely/never going to be the one to kill the adds, rather focus on DPSing the bosses. Leave the AoEs to Swordsmen and Wizards. Also, you could drop a point or two in Main Ranger in order to get Camo. I never went over 1 point in MR, and I think it sufficed.
Edited by Appewz, 27 April 2013 - 11:37 AM.