Set Ultringa easier to get, and it gives good protection.
Not really. Its bonuses are mostly for armour ratings, which provides damage reduction, and that's not really all that spectacular. I equipped Ulthring's set with the second best armour enchantments I could get and it ended up like this: +82 Melee/ +36 Ranged / +24 Magic. In comparison, the Scorpion Armour (minus the gauntlets) gave me +49 Melee/ + 15 Ranged/ +19 Magic.
Even the +33 difference to Melee armour only gave me an extra 7.82% damage reduction, although I did get an extra 15.82% reduction for ranged and an extra 18.32 magic damage reduction.
The real problem is that damage reduction doesn't matter as much as health and health regeneration, given how hard enemies hit.