Armour of Living Death
You can turn your Dreadlord into T4! Oh wait, that's still pretty low. This is not the way to keep your Dreadlord alive. Especially for its points cost.
Armour of Destiny
Not bad... but you'll get more mileage out of running the Armour of Eternal Servitude with the Dragonbane Gem. If either of those are taken (and the Pendant of Khaeleth is already taken) THEN this becomes useful. Not a bad choice for throwing on a BSB however, since he's not likely to be the primary person to get the better items.
It's a cool item, but for its cost I don't think it's going to be much help. Dark Elves are T3- you're going to be getting wounded so easily anyway that re-rolling isn't going to save you.
Armour of Silvered Steel
Take the Armour of Darkness instead. 20 points cheaper for a 1+ save. That's a ton better (and cheaper).
Armour of Fortune
It's not bad, but not great. 5+ isn't a high enough ward save to get excited about, but it's fine for its points. Given that you're not taking tons of characters, I would find better ways to equip them. Also, for non-flaming attacks, the Armour of Eternal Servitude is better.
Armour of Eternal Servitude
It's pretty fantastic, especially since you can combine it with the Dragonbane Gem to get good all-around protection, for a very reasonable cost.
Helm of Discord
This is kind of a cool item, honestly, but it's useless against some armies, and not really great against most. I bet there are armies out there that could make good use of it, but I don't think Dark Elves are one of them.
Unless you're trying one of the builds with the Ring of Darkness, this item isn't worth it. If you are trying one of those builds though, please let me know how it's working!
Shield of Ptolos
It's not very difficult for Dark Elf characters to get to 1+ armor save, or even to 2+. Designed for other armies.
Cloak of Hag Graef
This only helps if the character is on his own (or in a small enough unit), and if you're doing that, you're better off with the Pendant, or some other protection. No thanks.
Armour of Darkness
Still a great buy. 25 points nets you the best armor save you can get. Combined with the Pendant, you're VERY well protected. Makes a great item for your BSB, Dreadlord, or any combat hero.
Shield of Ghrond
Basically, you consider yourself to be Toughness 4. As I've said, that's really not enough protection, especially since you can't take other magic armour if you take it. Don't take it.
Better ways to get Magic Resistance. Don't take it.
A 6+ ward save isn't worth spending 20 points on. Again, don't take it.
This wasn’t a good item in 6th, but is not a terrible choice in 8th. Most people are saying that the Black Dragon Egg will work with this, and as far as I can tell, this works. That means this is a VERY easy way to get to a 1+ armor save. Coupled with a high Initiative as well as a halberd (a great choice for Dark Elves these days), you are going to get a great armor save for very cheap. Consider taking it.
I really like this, because it's a great counter for the Lore of Metal and pairs fantastically with the Pendant of Khaeleth. If you're trying to get good protection on your character, this is a good addition.
If Dark Elves could pay 5 points for this, it would be great. Since they have to pay 15 for now, it's really not worth it. You can get a plain shield, and pick up the Dragonhelm for the same benefit, and a ward save against flaming attacks.
Not a good choice, even for its points. You aren't made much more survivable by having a single chance to ignore a hit.