Many people assume that Iron Man's best aspect is Protection, due to the large number of tech upgrades it offers (Energy Barrier, Electrostatic Armor, Forcefield Generator, etc.). I'd like to bring to your attention an equally interesting, if not more powerful, alternative: Leadership.
Why? Because tech upgrades you attach to your allies also count as upgrades you control.
Upgrades like Reinforced Suit and Power Gloves definitely qualify, and you'll want as many of those as possible. Grab Suit Up, bring some Avenger allies who are either cheap (like Blade or Stinger) or who love upgrades (like Ronin), and build your army of tech-powered heroes while you'll use your Ingenuity to perfect your armor (in alter-ego form), with the help of trusty Pepper Potts and from the safety of your Stark Tower, so that you'll be unstoppable when you'll join the battlefield.
Awesome.