Wonder Womans powers are infinite as to where IM has to worry about power depleting or malfuncions occuring. WonderWomen hits pretty damm hard so I hope the armor can hold up to repeated hits. She is pretty good at blocking projectiles with her bracelets so his projectile weapons are kinda useless. I give it to WW.
__________________
The price of fame is high and the Thing cant pay the way.
During AVENGERS VS JLA Metron give IM a mother box to reach JLA Dimension with the other Avengers, the MB was able to enhance IM's armor sensors and powers, but without it he would be less powerful than how he was in the crossover.
IM's fought head to head with both THE HULK and THOR singly for hours without giving in inch. It depends which version of his armor he's using.
I'm going to have to go with The Invincible One himself since i don't think that WW wouldn't last that long with either of those two guys. She would be down for the count.
Like you said. It depends on his armour. His conventional Armour would lose.
The Hulk and Thor battles were do to hours of preparation. Iron Man does not know WW soo....
WW would win. Class 100 strength, nigh-invulnerability, faster than the speed of sound superspeed, indestructible silver bracelets, and a telekinetically manipulated indestructible lasso.
Iron Man is out of his league. A blur of punches and kicks and Iron Man is down for the count.
And WW would last a hell of longer with Thor and the Hulk than Iron Man would.