The Cube is pretty light on planeswalkers and you wont find traditional white staple Gideon, Ally of Zendikar here, which leads me to believe that creature-lands such as Mishras Factory, Mutavault, and Cave of the Frost Dragon will be even more important for the aggressive decks than usual
This is a deck that is incredibly quick and easy to set up given that it only uses Stage 1 Pokemon (or Basic Pokemon) and none of them require any more than two attached Energy to be useful
The easiest way to do this is just take however many slots you would normally fill with two-cost mana rocks, and replace them with two-cost Merfolk Looter (and other creatures with similar draw-discard activated abilities)
How Fun Are The Final Fantasy Precon Commanders
Because these are low-rarity cards that have abundant reprints (except Ossification from Phyrexia: All Will Be One ), the text on the card wont affect the price much
Frank Karsten from Channel Fireball wrote this detailed article on how many games you need to reach Mythic