Honestly, the entropy ones are all that pose a threat to me, on my fire farming rush deck. Water only wins about 1 in 50 against me, he's annoying but doesn't hold enough power to take me down before my dragons do the job usually. The maxwell's demons against ruby dragons just plain hurt, though. And chaos seeds. And all of entropy. And if he gets that dissipation shield in.. I'm toast. Time is annoying but even with rewinds he rarely if ever poses a high threat. *Shrug*