CT and Coil drop rates

[Magnesium02]

However, I was wondering what the drop chances for each piece of loot in a given loot pool is.

Crystal Tower Loot Spreadsheet
Coil Loot Spreadsheet

As far as Crystal Tower goes. Chests 1 & 2 contain Hands, Feet and Waist and Chests 3 & 4 contain Legs, Body and Head. The loot is distributed evenly, so one chest will have 2 pieces of 3 sets and 1 of the other 3, then the second chest will have 1 piece of the first 3 sets and 2 of the second 3. All pieces have a 11.11% (1/9) chance of dropping.

As for Coil of Bahamut, the loot is not evenly distributed, as some turns have more of one type of gear then the other. In addition each chest has its own set loot pool, so within the turn the individual chests might favour one type over the other. As you can see below, Turn 1 favours DRG (and Tank if you consider the shield), Turn 2 favours Tank and Caster, Turn 4 favours MNK and Healer, Turn 5 favours BRD. I didn't infuse the weapons chest as that is Job only, not job group type, but they are 11.11% flat chance each