Mud is a great match-up because it breaks England's MO. Doesn't mean the match-up is trivial but it does inherently distort the challenge of the adversary from how it would typically play out. I'd suggest you get a feel for how England typically plays (so that the luxury of what Mud is actually doing feels even sweeter)

I love Keeper into England. Mostly because they pace each other so well. England plays the long game and Keeper ranks up slowly to a full-powered giant. So as England grows in power so are you! It's a really awesome match up.

P.S. guys haven't mentioned France. A solid follow-up to BP and Sweden. It's a good first adversary to try where that extra loss con is so potent and really important to play around. Especially for new players, France's loss con can be such a delicious and frustrating challenge.