Just a FYI...
http://diablo.incgamers.com/forums/threads/legendary-drop-rates-data-torment-drop.858143/
If an item in your game drops from one of those collections (i.e. Helm, Bracers, 2H Flail, 1H Crossbow, Ceremonial Dagger etc) then the other items from that collection are in THAT game.
This also applies to Kadala. So *ONLY* Gamble on Kadala *IF* an item that you want has had another drop from it's drop table.
Just to explain that website, IF you get lucky and get a Legendary assigned to your drop (from mobs), it has to then check to see which item type it will be. Then it will roll and see which item from that type will drop. (And then it will roll to see the stats for the item)
For Destroyables/Jars/Chests/Loose Stones/Corpses - these can drop anything in the game as their loot is pre-determined on instance creation. Drop Tables are determined on game creation. Far too many Clan Members IGNORE these, but they are missing out on a lot of items by doing this.
Been testing this for over a week now with Fight, TheFallen, Mike306 and a few others and it is 100% accurate and true.
DON'T WASTE YOUR SHARDS ON ITEMS THAT AREN'T IN YOUR DROP TABLE FOR THAT GAME!!
Drop Table is shared for everyone in the game, but you are more likely to get your class items than other class items, however it was guesstimated that it was 10-15% chance of Non-Smart-Loot drop for legendaries with other classes in the game.