June 17, 2009, 01:39 PM
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#8 (permalink)
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Re: Meta Gems
Quote:
Originally Posted by Hammo
he he, not that I don't believe you, but is there any theorycraft anywhere that backs that up? 
I have always thought sp > crit, especially for an affilock. |
The 3% crit is not crit% but a direct increase in damage which essentially is a meta gem that forces the spell power you do have to scale much better.
I know someone linked the EJ Affliction thread, but that thread is long and I am not sure the math is really in there (they tend to leave it to the simulation to prove the point).
In terms of theory craft, if we make some napkin math assumptions that spell power is roughly where a lot of our spell damage directly scales from and that you are sitting at 2000 SP and let's say 25% crit (raid buffed and talents etc)
Then adding 25 SP with one meta gem would be
2025 * .25 = 506.25 extra crit damage
Whereas if you plug in 3% more crit damage (which is 3% * 2 because it scales the normal hit part of the damage when a crit occurs as well)
then the formula is
2000 * .25 * 1.06 = 530 extra crit damage
Now, these numbers and formulas are too simplified since of course there are base damage to spells and different spell damage coefficients, and different cast times, but essentially the principal of the reason the chaotic gem is superior is illustrated here. The above is just meant to just show simply the more spell power you have already, the more the 3% crit damage meta gem scales.
Alternatively you might ask what happens if you are low on SP. If you plug in 500 SP as a base spell power (which is ridiculously low), then the formula actually becomes 131.25 for the +25SP gem vs 132.5 for the 3% gem. The 3% gem still wins out. You would have to have a very low spell power for 25 spell power to make more of a difference than increase your crit damage by 3%.
And of course, affliction locks have benefited from crit for months now, so the chaotic gem makes sense.
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