I have 23/40 non-dupe mythics from the KLD block. Here is the breakdown of how I got them.
Bought: 2
Coalition Prizes (when this was a thing): 7
Event top 5 Prizes: 3
Event top finisher exclusive prizes: 5
Opening packs: 6
So as a player in the top coalition in the game, who consistently places high in events, and was willing to spend some money, I managed to bag 57.5% of the mythics. However, if we throw out the top 5 prizes, and old school coalition prizes I would have a whopping 13/40 = 32.5%. And that's with winning all 5 of the exclusives available.
I played every event. I spent my resources. I won consistently. I paid for good cards (until Not.Another.Dime).
Is this really what we want the game to be? Even the top players get to play with less than a third of the mythics. And don't get me started on masterpieces. The card I want to play with the most is Black Vice. I will NEVER be able to play with it regardless of what I do in game or how much money I spend unless I get totally and randomly lucky.
Sidebar: (Spending $10,000 would get you 300,000 crystals, buying 1000 premium packs or 15000 cards + 1000 rares. If the odds of a masterpiece (as gathered by the below link) are .1% then you would expect 15 masterpeices. There are 19 in the set so the odds of hitting any specific one are 1/19 once you "hit" a masterpiece. And with 15 chances on it your odds of getting your desired card are roughly 55.6%. So $10,000 US will get you about a coin flip shot of getting a black vice or your card of choice.) End Sidebar
I already expect this duplicate conversion system to taste like ashes in my mouth. We shall see.
https://docs.google.com/spreadsheets/d/1JUeuf0BcOlNHpt3dA7SQ838ws7AOlWMEz-4AAG2dYrE/edit#gid=545160007