I'm really surprised to see such a high winning rate, as to my own experience, this deck, just like the fire lance sudden killer, has the problem of breaking the shield chain. you have like at least 20%-30% of the times won't be able to chain your shield.
thus you're likely to lose to even those on the "easy" list.
the fire lance deck has a total winning rate of around only 20%, I thought this deck should have a similar result.