The best way to "bow kill" with a ranger is to use the bow as a hybrid damage source. The key to this strategy is fighting monsters who flee at 20%.
Instead of trying to whittle down 80% with bow damage (very slow and LOTS of arrows), you can try this...
Hit the enemy with your biggest DoT, then snare, then haul ass and plink away. You can even spin, shoot, nuke, shoot, and run - maximizing DPS around your paltry nukes.
Even taking your opponent to 70% with this strategy gives you a huge advantage, because suddenly you only have to take them down another 50% in melee combat before they start running. This cuts your loss of hp per fight in half, meaning less downtime!
I leveled like this quite a lot in Karanas
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