User blog comment:GimmeStarfoxWii/Help this noob ward/@comment-5556439-20130423074339

Sighstone in my opinion should be your first item as a TRUE support(Lux, Nidalee dont count really, they benefit from Tear to much) as it will give your lane, river, drag, enemy blue, and tribush a ward, base when those are about to run out and spam even more wards as you shouldve bought more even thoguh you have sightstone. Philostone is also a must so you can keep up a steady amount of vision, make sure you have the correct runes/masteries for gp10/5.

About 5 in my opinion early game, sighstone + 2 + pinks mid game, sighstone + pinks late game

So about 6 on average