The final big proliferate-friendly card I'd recommend is Tezzeret the Seeker, which can find your important artifacts more efficiently than the other tutors can, plus it also acts as huge ramp if you've got an Everflowing Chalice or Empowered Autogenerator on the battlefield
In this case, substitute with different cards that can still give you the mana you need without overwhelming your opponents by comboing off
Just try and take their milk
Environmental Sciences may be the most important Lesson, but Mascot Exhibition is the most impactful, ensuring that every deck in Standard has potential access to a couple more top-end haymakers
Values for the Reverse Foil #5 Flareon HOLO R have spiked in recent months
From the Armorfyber surface to the secure magnetic closure, every element is designed to provide superior protection for your collection