Some may find this interesting. Yesterday I ran several dungeons and noted what cards were drawn (I've got two monitors, it was easy)

Here's the Data(link)

Its worth noting that over 200 draws, there were numerous 'dry runs' where cards simply did not appear - and I think these runs are statistically significant when they run over 10+ draws.The average was around 19 draws without seeing a given card, and the longest dry spell was a whopping 31 draws in a row! I've annotated the data to note when these runs occur.

There's also a propensity to see certain cards draw more or less back to back, followed by a few 'random' draws before sticking on another card.

Bole and Arrow far and away had the highest draw chance at 19%, while Balance and Spear were the lowest at 15%.