Since youre making artifact creatures, have them up as blockers at all times by untapping them at the beginning of your end step with Lita, Mechanical Engineer
Outside of these upgrades, we get an improved mana base, with channel lands and Mishra's Foundry, and a few sideboard improvements, like Reckoner Bankbuster for more card draw against control and Unlicensed Hearse over Lantern of the Lost for graveyard hate
this most often comes from combat, but few people who have been on the bad side of a Lightning Bolt or Grapeshot would dispute their value
When were talking about dealing damage, several MTG sets buffed this strategy, like Ravnica Allegiance , through the spectacle mechanic, and Bloomburrow , through lizards
You wont often regenerate a creature, but having the option of countering a spell that targets you or fogging is great