@Xypherous: Can we make Ruby Sightstone into a better late-game item for the slot it takes up?

Even when you're supposed to only get RSS in late-game, it still sucks for a late-game item slot. Only 400 HP without any other resists attached, and its warding function isn't even improved by much simply because Riot doesn't want to make the upgrade mandatory. I can understand the "upgrade shouldn't be mandatory" part, but the upgrade is so bad that I'm left wanting to sell Sightstone in late-game and replace it with a Randuin or something else instead of upgrading to RSS. Warding late-game can easily be taken care of by teammates with Greater Stealth Totems.

Simply put, RSS needs to be more worth a slot, but still unattractive or even unviable as an early upgrade.

The simplest way to do that would be to make RSS give 500-600 health, but cost a total of, say, 2200-2400 gold. There, you can't rush it without gimping yourself, but it actually gives a decent amount of HP late-game.