Also, your post doesn't add anything to the discussion.
It wasn't suppose to.
What decks do you beat it with all the time?
Anything. Slavery, Landstill, WTF, FCG.
What type of Parfait is it?
Cherry Parfait.
Is there a specific weakness you exploit that could possible be shored up?
Yeah, if you want to shore up Parfaits weakness I have a really good solution. Change decks.