Tizlak's Aquabreather
I don’t think you can change breather stats in the forge like that. I think you’d have to just buy the recipe and craft it. If there’s not a recipe for it, then it might be a bug or might not be released yet.
As Rose said: we can’t change stats on breathers.
Since ANet hasn’t fixed this, I hope this means that they are finally considering turning breathers into skins that change the look of your underwater helmet, i.e. so we don’t have to slot 7 runes for the tiny amount of time we spend under water.
John Smith: “you should kill monsters, because killing monsters is awesome.”