Re: 100th Yvaalis deck on the forum!
5 bows is a lot hehe. I just run 2 Sharkbone Bows and that seems to work for me. I'm not a fan of Frosttalon in Yvaalis because 1) She has marksmanship and 2) She benefits from more ranged attacks. I always found that Ranged Sniper build with the Frosttalons is hit or miss and not consistent enough. As for ratio for Double shots, I've seen 3x Frosttalon work with Double Shot, so adding two more bows should increase the odds.
I also think you should change the Giant Toads for 3x Cloudracers. If you want to add 1 or 2 Giant Toads to that, that's fine. Yvaalis doesn't need steeds to work, but her lackeys do. Cloudracer gets them up to the front the turn they come into play. I personally run 1x Giant Toad and 3x Cloudracers, usually equipping the Giant Toad to Yvaalis when it comes up or ditching it to Feathered Gauntlets if necessary.
I'd consider 2 Faerie Bolts, as Shadith, Raak and Mormaenion can play it too.
Feathered Gauntlets is better than Gloves of Mischief in Yvaalis. In my experience playing Yvaalis, most actions you get targeted with can be handled by Shadow Token or Hood of Distraction
2x Submerge is the norm. You only run 3 in certain decks and this wouldn't be one of them.