In the last step of a mythical chart, all the chests that you dig up give gilded modifier to any items inside of them. At this one last step, you have a chance to get a set piece, notably from the lost sets. The chances of getting this chart are very small, and the chances that the last step will net any of the lost Items is also very very small.
And yet, the chance that the armor piece is not gilded is somehow not 100%…
…Please change this?
Reason? This absurd amount of rarity layers even without the final chance IF something is gilded already goes well past sunken. Even if someone were to use luck 5 or 6 potions/food before finishing the last dig of a mythical chart, they are still very unlikely to see a lost set piece.
Something that is way too rare will get people to lose interest in it. After people start to realize that it is not going to be worth either the time, or the money to save the time, to get it, people will simply lose interest to a pie in the sky too far up that they cant even see. My eyes glazed over realizing that even after all those odds, your efforts may still just be compensated with a normal lost set piece.
As it is, no one is going to trade it for galleons. This as it is is strictly the realm of limiteds.