So you’ve got the Rawr Epic Gear and the size of your GearScore makes you wet your pants but what’re you going to do with it? GEMS & ENCHANTS.
If you want to be an exceptional raider you have to pay attention to these items especially if you’re looking to get into a pug that will successfully clear a lot of content. A good Raid Leader will take more than your GS into account. They will scan your toon and see if you have the proper gems and enchants for your class and spec. This will come from your own knowledge of your character. Again, if you need helping knowing which stat to stack on your gear with gems, please don’t hesitate to ask any seasoned raider in Pendragon.
First and foremost though, if you need an easy guide to seeing what you could potentially be doing to your gear to upgrade it I recommend scanning your toon on WOW-Heroes.com. This will scan your toon and give you a break down of your gear and possible upgrades needed. It also reveals your raid experience, which raid achievements you have and also how many times you’ve killed specific bosses in different raids. A raid leader can and WILL look at this and decide what sort of potential skill level you have.
Below you see two of my toons: Xerberus (my dps death knight of doom) and Xebediah (my fail priest that couldn’t shield you through Hogger if he tried).
Xerberus is completely gemmed and enchanted with all the necessary ingredients to make a leetsauce DK that pulls aggro from very angry tanks. You’ll note that down the gems column there are no possible slots I haven’t filled and down the enchants column I have a score of 15pts down across the board. If the enchant I used wasn’t the optimal one for my spec, this would be a 10, 5, or flat out zero. Additionally, if I didn’t place a gem in a slot, you would just see an empty box asking for it. To the left there are arrows to every piece of gear so that you may find an upgrade to your current piece. It’ll link you directly to WoWhead and help you decide what drops to drool over in raids.

Xebediah is kinda fail. And by kinda, I mean completely. You can tell I sort of gave up on him because I decided I hate healing on my priest. He’s wearing a lot of blues and yes those are fail BoA items I’m rolling with. There are gems he’s missing out on and enchants. This would be an example of a toon that is such a disaster that the Salvation Army wouldn’t spare me a cup of hot cocoa.
Now that THAT’s out of the way, let's take a look at a very tiny few of the most common enchants, arcanums, leg armors, etc. that practically everyone uses. These are purchased through havin exalted reputation with different factions. There are rare cases when the following aren't what you need but we're talking rarer than Rivendare's Deathcharger, Ashes of Al'ar, or the Time-Lost Protodrake mounts. Follow the links for each enchant to learn more. DO NOTE that there are also alternatives that can be used in the event of certain professions (i.e. tailoring, leatherworking, enchanting, etc....)
ARCANUMS (head enchants)
Arcanum of the Stalwart Protector - tanks
Arcanum of Torment - physical DPS
Arcanum of Burning Mysteries - spell slingers and healers alike.
LEG ARMOR & SPELL THREAD (pants enchants)
Frosthide Leg Armor - tanks
Icescale Leg Armor - physical DPS
Brilliant Spellthread - spell slingers and healers
INSCRIPTIONS (shoulder enchants)
Greater Inscription of the Pinnacle - tanks
Greater Inscription of the Axe - physical DPS
Greater Inscription of the Crag - healers
Greater Inscription of the Storm - spell slingers and healers
So there you have it boys and girls. Your Epic Gear just got more Epic-er-er-er. Go grab some more gems and learn about other enchants that can make your shtuff more leetsauce.