Guys I noticed this since 2.0 but I'm not sure of it so I'll share it to understand if it is only my impression or not :/

When I kill fastly a mob usually I don't get anything, when I see them die cause of dot (A lot of time I used Tridisaster + Bane + Contagion + Tri-bind) or anyway the fight last very longer then a burn session, usually I get a lot of more items :/

I tried with BLM too, I tried to attack a mob, sleep him attack another, kill the first and then the 2nd...
Only I noticed it?

Expecially i nthis way usually I obtain more stack of the same item.