I noticed that no matter what i did, i could never get most of the dragonnewt wildlands/horse grazer treasures.

Even sending in a vingan leader with heroic in all stats, 48 weaponthanes and 30 footmen didnt help, along with all the associated blessings, etc.

I was only able to get them by cheating and giving the same vingan leader stats so high that they cannot be obtained via cheating.

And i've explored my own tula more than 3 dozen times and i STILL cant get the dragonnewt armor.

Im strongly suspecting that some treasures are either heavily bugged or that theres some hidden requirements involved...possibly both.