To me, Close Shot is most useful when fighting back-to-back mobs, as such in linking type monsters.
Main reason is because Close Shot requires no action points, which allows you to fire it off without having to build up 'stamina'
When in the case of Shadowbind, which uses half the action bar.. even light shot is 1/8th. It gives you an extra arrow to fire off when waiting for your primary attack actions.
FFXIV (Wutai - Archer): Andarou Shun
FFXI (Carbuncle/Bahamut) + Various MMOs: Jiruu
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