Quote Originally Posted by Starbuck_Jones View Post
Pretty sure the only thing it takes into account is if you have visited the dungeon entrance, then your iLev gear. I remember reading that it would favor dungeons you have not finished, but in LK, I found that to be bunk. I would get just random dungeons that I had all the achievements just as often as those as I did not.

Also random is not as random as you may think. If you are not using your own 5 man group. The extra 'random people' you get my have specifically chosen that dungeon for a drop or some other reason and therefore it is not random at all. Like always getting crusade tournament heroic because the tanks were going for tank trinkets etc.
When they say not finished they don't mean achievements, but rather still being saved to having killed some of the bosses.