CT and Coil drop rates

[Marishi-Ten]

Drop rates seem to vary dramatically from group to group. We've been farming turns 1-4 for 10 weeks and have seen in total 3 healing drops (1 helm, 2 accessories). Meanwhile I'm full i90 (war) wearing mostly allagan and one of our DRG's is i90 with mostly allagan, etc, etc.

That doesn't seem normal. Two chests per turn (let's say Turns 1-4) with roughly a 1:8 chance to get a specific drop. That's 6 chests a week totaling to 60 items received. Out of those 6 chests there is roughly 48 items that the code could have chosen from (8 items in each chestish). 48/60. You should be getting duplicates, but not at the rate you're seeing.

It seems your drops heavily favor tank/melee gear while being sparse on healing. Has it always been like this? Do you see alot of the same "role" (loltrinity) gear dropping? Have you noticed any kind of variable that has changed things around?