A little Champion idea I've thinking of in my free time. Would appreciate your thoughts.

So It's like an illusion champion that is mainly used for supp or something.

The Q would create a clone with 25% of all the stats of the last champion it copied. Would be used like a pet and controlled with q click or alt. With a very high cd. Like a 30 sec or more. But survives until killed and cd doesn't start until then.

The W would be used to copy champions and if used on an ally then it gives a shield and if used on an enemy deals damage and grants vision of them. With low damage and a moderate cd.

The E would allow its clone to double, but with the same stat. Will only last 10 seconds or so. With a high cd.

The R will make a clone trade places with whoever the copied was, but is a 5 sec channel with enemies and they must be within 1000 or so range. While allies can be global. With a semi short cd.

Don't just go saying "too op." Explain why.