Question about Shadow Resist enchants

[Ahnubis]

I was checking out some things while I had some downtime at work and decided to check out Xav's armory profile. I noticed that he was using shadow resist on his helm, cloak and bracers. My question is even while he has all heroic gear is it a huge benefit to enchant for the resists instead of doing stam, def or other enchants in the respective slots for someone who has a mix of 10/25 man non-heroic ICC gear?

[Ion]

He enchanted his gear with SR specifically for the 25 man hardmode lich king kill. Unless you're working on that, no...it's not worth it for you to do anything out of the ordinary.