As the silent hunter watches the battle unfold he determine where he is now would no doubt best help his allies and unleashes two arrows in quick succession, one at the enemy facing Faurgar and the other at the enemy engaged with Nanes-Il.

Spoiler: Rapid Shot
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Full Attack no movement
Attack vs Nanes-Il's enemy (1d20+10)[20] Damage (1d6+10)[13]
Attack vs Faurgar's enemy (1d20+8)[20] Damage (1d6+10)[11]

I figured it would be best to try and weaken/finish off two enemies vs trying to take out one with slightly more damage.