Board Thread:Game Discussions/@comment-24.114.26.165-20131226090215/@comment-24108837-20131226223737

Yes it is normal. Elemental advantage strengthens your attack, not your defense. So the damage the Nemesis Armor does is 3 times the damage another armor with the same element and stats would do. The defense is unaffected.

If you have enough stronger armors you better use those instead of Nemesis. I never hear advanced players speak positively about Nemesis on the wiki. If they talk about it they mention its low value for fusion (similar to a Super Rare Armor). I am not sure about it but I think Nemesis will be great to get when you can't beat the EB without it at level 15. Once you passed that stage the benefit is limited.