I tried this on mobs using Garuda bow compared to Ifrit bow. My WS's were doing more dmg with Garuda bow but light shots were doing less. But Light shot delay was 1 second less with Garuda so I could get more light shots off on average each fight. I think the dps has something to do with WS damage as the main damage number for the weapon is about 30 less on Garuda bow than Ifrit bow.