[SUG]New AP item

This is a item I'm brainstorming about. It's from a larger suggestion I'm working on. I would like to get some feedback regarding the ballance of this item. Before I go further I want to mention this:

• has been reworked into a component. This item suppose to replace it for that function

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#New Item

• Recipe: + + 800 (=2600)
• Stats: 80 Ability Power, 100% Base Mana Regen, 10% Cooldown Reduction.
• UNIQUE Passive: Dubbles Cooldown Reduction from other sources.

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#The ballance of the passive

Champions

• : Gains 30% cdr with ult passive, getting this item basicly gives him 70% cdr & because of the cap he I'm pretty sure it's not worth getting it.
• : Gains 25% cdr with her passive, getting this item won't make her broken. And it will overcap to 60% so not really worth.
• : Gains 10% cdr with W passive, this is pretty intressting for her. With only that item and max level she will be able to get 30% cdr. I won't expect a lot of problem with it because she max her W last.

Runes & Masteries

• ** Scaling 40% cdr:** By taking scaling cdr glyphs you can get 40% cdr with just the item on level 18
• Early 45% cdr By taking 2.5% cdr runes + 5% masteries + the item + cdr boots you can get an early 45% cdr.
• Early 40% cdr By taking 15% cdr runes (quins & glyphs) you can get 40% cdr with just the item.
• Early 40% cdr 2 By taking 5% cdr runes (2 cdr quins) + the item + cdr boots you can get an early 40% cdr.

Items

• can be really effective combined with this item for an easy 30% cdr.
• can be really effective for some early 30% cdr.
• can be really effective for some early 30% cdr.
• can be a really intressting combination for hybrids to get 40% (not sure it's worth it because you overcap cdr again)
• could be intressting for certain AP tanks to get max cdr after turning it into
• Some AP supports could use it to get their cdr maxed out early.

Other

• Blue buff gives basicly 20% now with the item. Giving them 30% cdr with just the item. This might make certain champions a lot stronger.

Thoughts?