Relic of Sauron goes a small but meaningful way toward balancing the equation, offering a reasonably-priced combination of draw and ramp for Grixis-colored decks
The top five in the census are listed on the specific card's "home page." The entire ten-card census can be viewed by clicking the "more" link at the bottom left of the home page census
You can activate one of Liliana's Undead Minion's loyalty abilities the turn it enters the battlefield
The third deck, Paradox Power, is a Red/Blue/Green deck that will contain Doctors 12 and 13, as well as their companions
Note there are no restrictions here beyond that any counter counts from anyone's stuff, and then when it dies you can send them to a dork like your Commander or other stuff and then this is tucked
6 Ezuri, Stalker Of Spheres Not only does Ezur, Stalker of Spheres let you proliferate twice when it comes into play, but rewards you every time you do