In a 40-card deck, with 17 lands, it's typical to run 15-17 creatures and 6-8 other types of spells
It also works significantly better with things like the Shelldock and Oath which are looking specifically at the top cards rather than your whole library in the case of Tinker
The only problem with Mount Doom is it costs life to make mana, so you don't really want to draw it early
I've written at length about the products under that umbrella, and I recommend people give that format a try as well, if they wish to
In competitive formats, cards like Baral, Chief of Compliance, Goblin Electromancer, Birgi, God of Storytelling, or cost-reduction engines like Mizzix of the Izmagnus enable storm turns much earlier, while actual storm payoffs such as Grapeshot, Brain Freeze, or Tendrils of Agony win the game immediately without needing a 7-mana creature to survive
Krang, Master Mind Krang, Master Mind is perfect for a blue artifact strategy that wants a ton of permanents on the board