Large Scales I have roughly a 25% drop rate. I had a list someplace where my rarest drop was a small ingredient. I had something like 16 large scales and two of this small ingredient. And that included me doing loot runs on the shroud during LOOT weekends where I just did parts 1 - 3.

The chest in Part IV, now that is a rarity. Rarely do I get a drop there of any ingredient. I just consider that a bonus.

The hardest Shard is the Shard of Power. Never drops on the character I want it on. It only drops on the characters I have crafted with and has three in the bank.