In the mid- to late-game, with plenty of mana resources on the battlefield, Hew the Entwood is going to upgrade us in quality with a little cost quantity
With that in mind, this is the best archetype for cards like Stop Cold, Holy Cow, and Phantom Interference
Machina Fortress is great for unbricking multi-Gadget hands and pressure, as it has 2 nasty effects when attempted to be removed, and revives itself with additional fuel from the hand
Use that information wisely
Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn, then return Meandered Towershell to the battlefield under its owner's control attached to that creature." As the creature returns to the battlefield because of the delayed triggered ability, its controller chooses which player, planeswalker, or battle it's attacking