Red mana dorks live or die on whether the deck around them justifies the restriction, and TMT's common landscape only half-cooperates. The artifact subtheme is real (Bespoke Bō, Novel Nunchaku, the equipment package) but it isn't deep enough at common to build a true affinity shell. What you're actually drafting is a UR or RW artifact-leaning deck that wants a two-drop body and occasionally converts this into a turn-three double-spell once the dork can tap.
That puts the pick band at P1P7 through P1P10 in most pods. The body is the floor that keeps it off the sideboard: a 2/2 for two trades into Foot Ninjas, blocks Mechanized Ninja Cavalry on the ground, and survives a swing while wearing Bespoke Bō. The ceiling is narrow because the format is medium-speed and goodstuff-shaped. The legendary Turtle uncommons reward casting your best spell on curve, not assembling a mana engine off a vanilla beater, and the restricted red pip only matters once you have enough artifacts and activations in the deck to spend it.
UR Artifacts is the one archetype that genuinely wants it, and even there it competes with cards that raise the artifact count directly rather than just feeding it. RW Equipment treats it as a curve-filler that would rather be a 2/2 with a relevant keyword. Mono-red splashing a single artifact uncommon should pass.
The punisher is Grounded for Life: that white removal spell gets cheaper against a tapped creature, and you will tap this, so a one-mana answer trades up against your two-drop. Take it when your deck has already committed to artifacts and the curve has a hole at two.
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