This is a stupid question. Will luck of the draw give the 15% to the 3 people that have the buff or will the whole party get it?
Naw. As Blizz was working on buffing the Luck of the Draw buff, they noticed that it was actually not working for most of the dungeons.
The buff would display, but no one would actually receive it.
I'd dig up the quote for you, but I'm fairly sure it's still on the main page, so I'll let you find it.
The 5% buff stacks 3 times = 15%, you can see the little "3" in the corner like a normal stack.
However since i've pugged post patch im just getting a bunch of dk tards trying their luck to tank without a brain cell, feels like wotlk.