In my years of personal experience, examining good decklists, and talking to people much smarter than me, 50 mana sources is about the right number for most decks to shoot for, usually 37 lands and 13 ramp sources for a general budget deck
The strategy is to play Mewtwo in the active slot after you have built up enough energy and then use Gardevoirs Psy Shadow ability to refill Mewtwos energy for Psydrive each round, pulling an extra energy alongside the one you are automatically given every round
When Triplicate Titan inevitably dies, you get three 3/3 Golem tokens, each one with one of the originals abilities
While not as rare as Mana or Fracture Foil versions, the showcase frame alone makes it significantly more valuable than the base printing
You can also sacrifice a creature, and youll be left with a 6/5 vehicle
Mana Vault is a fantastic ramp spell as it nets 2 mana just by being cast