Couple things about tombs aside from the obvious issues

[Idly]

Firstly please remove locked crates from the loot table, rerolling from an elite planar chest is quite irritating. http://tapatalk.imageshack.com/v2/14/11/16/16819f115fe16a8de82ebf973401f639.jpg

I dont know if this happens to anyone else or just me http://tapatalk.imageshack.com/v2/14/11/16/0ab4af99e461ecf54120a8e7c2774042.jpghttp://tapatalk.imageshack.com/v2/14/11/16/2d2346dd3432da8a9ee886d7f21c7629.jpg
And another thing, again maybe its just me but tanks seem to get a lot more ancient essence than anyone else, from my runs it seems like 3-5x more on average with rogues receiving the least.

[Sir Lubo Penev]

And another thing, again maybe its just me but tanks seem to get a lot more ancient essence than anyone else, from my runs it seems like 3-5x more on average with rogues receiving the least.
Curious as it is, I noticed the same thing. During 3 consecutive runs with the same party tank got 3 essences, another party member got 1, the other two got zero. It is a tiny sample though.

As for rogues - I have more fragments than essences. If I include failed runs, the drop rate for me is probably about 1 essence in 2.5-3 runs.