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I've been running it for quite a while just in case, and I've wished for it twice - once because I actually needed it, and another time because I had to cast Burning Wish for enough storm count and...

You'll never fetch for it anyway, so you might as well play the City of Brass instead. You'll probably get away with less life loss and better color screw prevention.

Anything that runs 4x Wasteland and 4x Stifle.

Go with Volcanic Island or Tundra. I think you should try both before the tourney and go with whatever works better.

No. The tokens require two turns after the one you cast EtW in order to win, and without the life gain from Tendrils, you only have one turn if you chump block Tarmogoyf.