End of the season Glint spending and basic math — statistics and probablities

Motto: And now that you do not need to be perfect, you can be good.
(John Steinbeck)

Ended up with 200K Glint at the end of the season, as I was mostly out on holiday and did not have enough time to buy stuff. How did I use it?

Starting with 30 Ultimate chests, hoping for a Legendary. Did not happened. What I got instead: 19 Energy, bringing another 60K Glint after I used them for the matches. Another 75K Glint to account for it, with 2 Epic cards (15K), 7 Rare (5250), 75 Common, 5 of them Gold (15K), 6000 Merits (10K), and Potions, so, this is accounting for another 45K, a loss of 30K on buying 30 Ultimate chests. Learn from this!

Next, 400 Common cards, resulting on an average of level 6/10 right now (2 of them are already level 7).

Next, 98 Minor chests, to see if I get some better cards in there, for 20K, with 8 Energy (20K), 28 Common cards (5600), 3 of them Gold, 5 Rare…