Metagemming your tankadin

As I’m sure some have noticed, there was a major glaring omission in my previous guide on pally tank gems: meta gems. Metas are perhaps the most important gem you will socket, because in addition to a nice stat boost, you get a little bonus to an ancillary tanking stat.

Here are your options:

• Austere Earthsiege Diamond: +32 stamina (365hp) and +2% more armor
• Effulgent Skyflare Diamond: +32 stamina and 2% spell damage reduction
• Eternal Earthsiege Diamond: +21 defense rating and +5% block value

The only clear non-choice here is the Effulgent gem. It’s really more of a situational gem, and would be best fit in a secondary tanking helm you’d keep aside for resist or heavy magic damage fights (I’m thinking Sarth or Malygos mainly). Don’t use this gem for everyday tanking.

Now, where I am personally torn is between the Austere and Eternal gem. Since I first picked up the Arcane Shielded Helm in Heroic Nexus I’ve had an Eternal gem in my helm. Now, I’m beginning to question this. Let’s look at the math and figure out what’d be more beneficial.

Right now I have a base, straight-from-items, non-talented 20823 armor, for 57.8%. With the Austere gem I’d bump up to 21239 armor, for 58.2% damage reduction. A gain of .4% damage reduction.

Not a huge number, but let’s say a boss hits me for 25k (physical damage). As is, with the base armor numbers I have now, I’m only going to take 10550 damage. With the gem socketed in my helm I’ll take 10450. So 100 damage reduced from that hit.

Let’s look at block value now: according to Warcrafter I have somewhere on the order of 1222 block value (this is before the metagem and the bonuses from the Libram and Lavanthor’s Talisman). The Eternal gem gives me a bonus 5% block value on top of that number, for an additional 62 block value.

This means that every hit I take that I block I shave an extra 62 damage off the top. Which, of course, is where the rub is: I have to block the hit to see a damage reduction. Armor reduces damage if you’re stunned or fail to block, and even when you do block. The Eternal gem only works when you block a hit and all the factors line up to give you that DR bonus.

There are other benefits to the Eternal gem, of course. The 21 defense makes it easier to hit the defense minimum aside from other gem sockets. And on top of that, 21 defense works out to a nice bit of avoidance: .84% chance to block, parry, dodge, miss.

You’ll have to do the math to figure out which is best for you, but personally I think I’ll get more damage reduction benefit from the Austere gem. And I have enough avoidance elsewhere that I can comfortably replace that with the effective health, instead.

All this math aside, there’s nothing wrong with keeping a second helm with the Eternal gem for trash tanking or sweet ShoR crits.

I’ll be regemming when I get home tonight.