Use equipment to generate tokens to attach themselves to, and don't worry about summoning anything but tanks (or potential tanks).

It was originally made for a Friend Challenge, where we assigned each other Commanders and had to keep the price under $50.

Boros : Red and White

Affinity for Equipment (This spell costs {1} less to cast for each Equipment you control.)

Whenever an equipped creature you control attacks, exile the top card of your library. You may play that card this turn. You may cast Equipment spells this way without paying their mana costs.

Commander
Nahiri, Forged in Fury

Artifacts
Argentum Armor
Bearded Axe
Bladehold War-Whip
Bonehoard
Celestial Armor
Dragonwing Glider
Fabrication Foundry
Glimmer Lens
Hexplate Wallbreaker
Mirran Bardiche
Nettlecyst
Plate Armor
Ring of Valkas
Scytheclaw
Sword of Vengeance
Tarrian's Soulcleaver
Thousand Moons Smithy
Two-Handed Axe
White Mage's Staff

Creatures
Akki Battle Squad
Ardenn, Intrepid Archaeologist
Astor, Bearer of Blades
Boros Reckoner
Bruenor Battlehammer
Cloudsteel Kirin
Danitha Capashen, Paragon
Darksteel Juggernaut
Eowyn, Lady of Rohan
Foundry Inspector
Ingenious Artillerist
Jor Kadeen, First Goldwarden
Kami of Celebration
Kemba's Banner
Koll, the Forgemaster
Lizard Blades
Merry, Esquire of Rohan
Neyali, Suns' Vanguard
Odric, Lunarch Marshal
Puresteel Paladin
Rabbit Battery
Reyav, Master Smith
Rhuk, Hexgold Nabber
Sram, Senior Edificer
Stone Haven Outfitter
Tiana, Ship's Caretaker
Tori D'Avenant, Fury Rider

Enchantments
Gratuitous Violence
Inspiring Leader
Intangible Virtue
Nahiri's Machinations

Instants
Dawn Charm
Deflecting Palm
Master Warcraft

Planeswalkers
Quintorius Kand

Sorcery
Angelfire Ignition
Austere Command
Brilliant Restoration
Hour of Reckoning
Open the Armory
Reckless Crew
Reconstruct History
Unfinished Business

Lands
Axgard Armory
Citadel Gate
Cliffgate
Command Tower
Inventors' Fair
Mountain x 15
Plains x 14
Temple of Triumph
Thriving Bluff
Thriving Heath