What are the top strategies for building a competitive Modern deck with an affinity theme?

To build a competitive Modern deck with an affinity theme, focus on including efficient artifact creatures like Arcbound Ravager and Steel Overseer, along with powerful artifact spells like Cranial Plating and Mox Opal. Use cards that generate multiple artifacts quickly, such as Springleaf Drum and Signal Pest. Include cards that provide card advantage and disruption, like Thoughtcast and Galvanic Blast. Lastly, ensure a balanced mana base with lands that can produce multiple colors and support your artifact-heavy strategy.