Two of these droped after we killed the grandmaster. I was the only warrior there so I got them both, lol. Very nice replacement from my rehinforced dragonhorn boots. Just wish they added str or dex instead of wis. These will do me good till I can get my pair of thurg boots. The grandmaster was owned by 8 people lvl 55 and under. :P We also owned the broodmaster that day to.
Even without the int/wis on these boots they are nice boots. BTW, int helps the wearer with skill ups faster, not to mention trade skills. Sure, the wearer wouldn't need wis and int in many cases, but I would rather have it then not have it. Excellent resist gear, I happen to wear these as primary gear.
The reason why is verant trys to even out all stats when you have a full set of any armor. (example = Crafted, Lambent, Planer... whatever) So they balance it all out, its true just take a look at the rest of Indicolite armor. With all peices all your stats and your saves will have abonus of some kind.