3. Mark L (Avengers: Infinity War).
I, on the other hand, favor the one with nanotechnology over either of those. Not just does this Iron Man armor, introduced in Avengers: Infinity War, blow Tony Starks “Suitcase Suit” out of the water in mobility (easily housed in a removable system he keeps on his chest), it is stronger, quicker and geared up with more weaponry than any suit before it thanks to nanite manipulation that permits Stark the ability to develop a nearly unlimited arsenal of alternatives. The only reason that it falls short of the fit that succeeds it, in my opinion, is that it was not the one Stark saved the world in.
