EDIT: Finally got to masters with this! Woohoo!
The deck's consistency dramatically went up when I removed the
Valkyrie Spireguard (they were fine, but often unimpactful) and added the 26th sigil (finally stopped screwing so much) and the
Aerialist Trainer. I thought this last card was going to be bad, but it ends up in a similar position than
Whispering Wind, where it smooths up some bad or mediocre draws, and it blocks super well on the ground. It's also entirely disposable, so you can take "risks" while blocking.
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This deck's been performing quite well for me, and it's very accessible since there're no legendaries in the list. I just don't think any legendary card would actually make the deck better than what it is right now.
The trick is to get one big flying threat and protect it. This will vary a little bit depending on what you're facing (sometimes it's better to just go wide, or play defense for a couple of rounds), but that's the gist of it.
Some of the best plays the deck can make is
Silverwing Familiar followed by any equipment.
Hammer of Might is great since it boost your next creature to come into the battlefield "equipped" (+3+3), but
Cloudsnake Saddle is also good, since you'll be able to keep power open for Backlash or Protect.
Sorry to hear that. The deck's not super easy to play, and although I don't think the matchup against skycrag is terrible, it's not favorable.
Your best bet is Silverwing equipped or buffed. Aerialist is also good in this matchup, don't be afraid to cast him just for the body.
If you keep seeing this matchup a lot, feel free to swap some backlashes for storms - most your creatures survives the storm anyways, and if you can 2x1 them, you can generate enough time to stabilize.