Re: WMUD I have played games vs. it. I play a basic mountain instead of the reef. I have lost a few times but it had more to do with not drawing a burn or force to stop welder and smokestack.
I am going to say this once: NEVER let welder live. I play 4 fire/ice, and 4 bolts. I serve goblin fricassee! Just get your drain mana up (2 islands, maybe 3 if they have a sphere out) waste their shops. Drain into disk and ask them if they want to concede. R&R is the pawnage just keep getting basics and stifle their strips. Some how MUD does get lucky but you should crush it.
Replace manland= NO!!!!!
Replace shivan reef with mountain=What i am doing.
also if they have you under only under a wire with no welder or karn/etc on the board, drop the standstill if possible. They have to cast things to win. You just have to keep playing land

Just play your land a turn and you will eventually catch up with them in permanents.