Eerongal:
Sazed mentions, only in passing, that he used his ironmind it shove Koloss when they needed to be shoved. So he does indeed use his ironmind in his fight against them, but most of it is used when he closes and holds Steel Gate against them.
douglas:
I was making specific reference to the reason that Tineyes could see through the mists when, in reality, they shouldn't have been able to. It was because the mists of the time were the Body of Preservation in gaseous form.
As for the mists themselves, this seems to be the only mention of 500 years from MB3 mists:
Hi, new here, registered just so I could ask some questions:
2) When the Mists come back, will they continue Snapping people?
2) No. The mists will revert back to their more neutral state.
For me, this says, 'It'll be like before the death of the Lord Ruler.' So, nightly fog.
little_wilson:
Actually, the opposite is true. I just finished re-reading the fight between Marsh and Sazed and what Sazed did, every time he tapped his ironmind, was increase his weight and screw up Marsh's pulls and pushes. He even used his weight to drag Marsh to him and smash his face with a lamp(And all that stored weight). He never stored any weight during that combat. Either way, I recommend reading it again, it's really good.