I also search multiple Japanese sites as well as ebay every single day for cards using a couple of different search terms so Ive been able to get most of the cards listed in the last couple months
Ramping a bit harder might fit your plan better, especially in mono-blue where bounce and counterspells are your typical interactive tools
You'll have to use cards like Volcanic Vision, Revolutionist, and Ardent Elementalist to keep them coming, but that feels like a worthwhile investment to keep Blanka's pound cake coming
You need to cast a flurry of spells then wait for a turn cycle to pop off, giving your opponents time to prepare for your combo turn
If I adjust the 144 holos pulled in the videos to account for a sheet size of 110 (which remained the sheet size for holos well into the Nintendo era), I get an average of 3.7 for the final forms of the starters and 6.8 for the other holos
Can't we just go by the official rulings that Wizards makes