User blog comment:Mineko Charat Lucky/Stop Telling Me What to Build, Thanks/@comment-5589202-20131013172139/@comment-1330314-20131014130113

Supports need to be as gold-efficient as possible, and Sightstone is one of the most gold-efficient items you can have. Lay 8 wards with a and the item pays for itself, and from then on you have a near infinite supply of free wards, plus an extra bit of tankiness. At this point in the game, vision is one of the most cost-effective and powerful bonuses your team can have, so even if you set back your or / for it, you will still have a massive advantage with it.