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Okay. I tried Haven in rotation. There was one new Jeanne, one Aether, and one celestial knight. I added another Jeanne, two more Aethers, and another celestial knight. I didn't add any Snow Maidens. So far, it's going well: I lost to Dasharun once on A3, and won the other 7 attempts. I haven't had such stability in a while... At the same time, you don't get "brain dead" playing this deck; it's often amusing how Temple reduces your attack instead of increasing it.
And Dasharun seems to be a counter-deck. It's very difficult to fight against it.