How to Downgrade IOS 8.4.1 to older version, IOS 7 or IOS 6

[iMore Question]

I've update my IOS to 9.0.1 and then I downgrade ti IOS 8.4.1 because IOS 9.0.1 laggy for my 4S Phone

Is it possible downgrade it anymore to older version IOS 7 or IOS 6 using tinyumbrella SHSH blobs?

here is my tinyumbrella ss

 

[kch50428]

I don't think it's possible blobs or not.