It’s a bit of a convoluted story so i’ll try and start at the start and keep it short.
When looking at stat weighting for priests (notice an obsession here yet?) one thing that is argued about no end, but with no definitive or agreed answer, is the ratio between throughput and mana regen. This is basically a magic ratio which joins heal equivalence points (HEP) and mana equivalence points (MEP) allowing comparison and conversion between the two. Previously i’ve used a spell power to mana regen ratio of 0.6. Others have argued for ratios more like 1.5 or have suggested the item budget ratio used by Blizzard be used.
This last suggestion eventually got me thinking about exactly what was the item budget used for determining how much intellect or spirit or spell power on an item.
Gems are a clean example of the expression of item budget because they exist with one or two stats making solving the equation for how much spirit equals how much intellect equals how much spell power an easier one to do. So I started with the proposed epic gems for 3.2 (which turned out to be lucky) and tried to solve their item budgets. I don’t have any idea what the total item budget for an epic gem is, so I arbitrarily choose 100. That could be 100% or it could just be 100. In the end it doesn’t matter as they are effectively the same thing.
Edit: Following zustreke‘s comment i’ve changed the base to 20 instead of 100 for epic and 15.5 for rares.
With a bit of spreadsheet magic I came up with these weights for the stats:
- Spell power = 0.833333
- Intellect = 1
- Spirit = 1
- MP5 = 2.5
If you apply them to all the epic gems I was interested in you get this.
|Epic||Luminous Flawless Ametrine||12||10||0||0||20|
|Epic||Brilliant King’s Amber||0||20||0||0||20|
|Epic||Seer’s Eye of Zul||0||10||10||0||20|
|Epic||Dazzeling Eye of Zul||0||10||0||4||20|
|Epic||Sparkling Majestic Zircon||0||0||20||0||20|
|Epic||Lustrous Majestic Zircon||0||0||0||8||20|
|Epic||Runed Cardinal Ruby||23||0||0||0||19.1667|
To prove or test this I applied the same weights to rare gems like so:
|Rare||Runed Scarlet Ruby||19||0||0||0||15.8333|
|Rare||Luminous Monarch Topaz||9||8||0||0||15.5|
|Rare||Brilliant Autumn’s Glow||0||16||0||0||16|
|Rare||Dazzeling Forrest Emerald||0||8||0||3||15.5|
|Rare||Purified Twilight Opal||9||0||8||0||15.5|
|Rare||Lustrous Sky Sapphire||0||0||0||7||17.5|
|Rare||Royal Twilight Opal||9||0||0||3||15|
|Rare||Seer’s Forest Emerald||0||7.75||8||0||15.75|
|Rare||Sparkling Sky Sapphire||0||0||16||0||16|
So what does this tell me? Well firstly there are a few issues with the stat weights. Or rather not with the stat weights, but the stats themselves. For the rare gems their total weights should be 15.5, but many are not. A bit of work using MS Excels Goal seek function led to an interesting discovery. That is that when the designers are doing their thing they usually round up. So:
- Runed Scarlet Ruby should have 18.2 spell power, but it is rounded to 19
- Brilliant Autumn’s Glow should have 15.5 intellect, but it is rounded to 16
- Lustrous Sky Sapphire should have 6.2 MP5, but it is rounded to 7 (this is the reason the epic Lustrous Majestic Zircon looks so useless) as this gem is a bit, relatively over-powered
- Seer’s Forest Emerald should have 7.75 for each of its intellect and spirit, but this is rounded to 8
- Sparkling Sky Sapphire, like the Brilliant Autumn’s Glow, should have 15.5 intellect, but it is rounded to 16
- Royal Twilight Opal is the exception, which was rounded down. It should have 3.2 MP5 rounded to 4 MP5, but instead rounded down to 3 MP5. Or 9.6 spell power rounded to 10 instead of down to 9. Either way it was rounded down. This gem is also the best example of why an item budget of 15.5 for rare gems makes more sense than 16. If it was 16 this gem should have another full point of spell power on it.
The epic gems are less complicated and working on them first probably saved me some confusion. They are all spot on except the Runed Cardinal Ruby. This gem is a strange one because it can afford to have exactly 24 spell power, which would hit it’s item budget right on the dot, but for some reason it only has 23.
So once 3.2 lands and you are all busily acquiring Runed Cardinal Rubys to put on your gear just remember your being ripped off 1 spell power each time 😉