Sightstone rework concept

Sightstone is a core item on every support. While it is tied into the gold starter items many people would like to fully build their starter item and then get a regular sightstone. However is usually sits in there inventory as a sightstone without getting upgraded to a ruby sightstone as its not worth the gold.

What if ruby sightstone was deleted and replaced with a new item called Prismatic Sightstone.

A new item is made named prismatic crystal made out of a ruby crystal a mana crystal and emerald crystal (health and mana regen new item)

Prismatic crystal: 200 health 200 mana 100% health regen 100% mana regen 10% cooldown reduction

Passive : gives 1 ability power, armor, and magic resist per level

Now for prismatic sightstone

Prismatic sightstone: 400 health 300 mana 150% health regen 150% mana regen 10% cooldown reduction

Passive: active: place ward (the usual)

Unique Passive: gain 2 ability power, armor, and magic resist per level. Gain am additional 2 ability power, armor, and magic resist for every 1% cooldown reduction over 40% (cap)

This would actually scale well into Late game and instead of selling the sightstone it would become very useful.