I think it actually is 7.7 degrees. If I quickly calculate the height above elevation at WAKOR and divide by the 2.2 nm converted into feet its a 14% gradient!
As you say, at that altitude with higher TAS it could be a challenge. I would add some extra altitude to the MDA in case of straight-in approach. Gonna loose some altitude before positive climb is established when using it as a DA 
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