Decks that include Manaphy tend to include just 1 copy but may push it to 2 copies if their bench Pokmon tend to be especially vulnerable or especially critical to their decks strategy
A layman might think that its a bootleg, rather than one of the rarest and most expensive cards in the whole hobby
Apart from lands, ramp, draw, and removal, I would make the other categories "enablers" for cards like Awakening Zone and "payoffs" for cards like Dictate of Erebos You might notice you're not running too many ways to generate enough tokens and a tad too many sac outlets or payoffs that aren't triggering often enough
For example, Reliquary Tower from Core 2019 sells for about $3.00
What best means for MTG proxy printing Best depends on what you care about
Now an Enigma Drake can get bigger and bigger over the course of a game while Invade the City's base size is going to be fixed once (unless modified by other Amass cards)