Best bow for ARC/BRD

[Enfarious]

Garuda's Spine wins for BRD. Sure, ARC/BRD damage is significantly Light Shots, and although they may hit a bit less with the Spine than with Ifrit's, you can throw them out more often. The DPS value speaks for Light Shot damage as well in the sense that doing nothing but LS on every cooldown you'd do higher DPS than with Ifrit's. Being that the DPS value is higher on the Spine, you also do greater damage on weapon skills with the Spine.

Overall I don't see the Spine being beater by any bow on BRD due to the magnitude at which DPS effects damage done compared to other stats/atributes.

It's also for this very reason, DPS, that Sarnga +1 is best for ARC.

The DPS value is only a reflection of dmg/delay for the possible (@100% hit rate) dmg it can do. It's not what it will do, and for any calculation it's the damage value not the DPS that is taken into account.
That's not to say that higher DPS doesn't mean anything, it gives an idea of the dmg that will be done by your LSs and AAs, which do play a significant role in anyone final DPS.