If I were to upgrade these decks with pulls from booster packs, then I would shave some of these weaker cards, especially ones that cannot be turned into ink, and add more five-drops, six-drops and seven-drops
Second, we have to be aware that milling has a stronger psychological impact than logic would assume
As mentioned earlier, the best way is by casting your spells at instant speed, putting your creatures onto the battlefield without casting them, and stopping your opponents from casting multiple spells each turn
For context, a Charizard EX #199 Grade 10 could go for over $700, while a Grade 9.5 of the same card would cost about half of that (at $370)
For $18, you get 40+ ebooks covering foamwork, LED wiring, sewing, armor templates, and even a cosplay planner