Swan, I've done some pvp research and come to the conclusion that maxing attunes is priority one for pvp, even more important than the respective skills they boost.
I assume that you are referring to lower level pvp, when you don't have enough skill points to max both damage skills and the corresponding attune. If you're a higher level mage, it doesn't matter, because you can just max all of them.
Due to the fact that dmg skills are nerfed, putting pts into them wouldn't have as much effect as if you put the pts in attune, which is not nerfed in pvp (due to its status of being a buff)
I believe that the nerf applies for the attune as well. Even though attune is a buff, it is subject to the same treatment as skills.
You can test this out for yourself if you have an extra alt book. Reset fire bolt and firestorm to level 1, and max attune as high as possible. Suppose that your attunement now boosts 2k damage, and your fire bolt and storm do about 100 damage each at level 1.
Walk over to some dummies and fire bolt/storm them a few times. I am fairly confident that you will not hit 2k damage every time. This is because your attune is treated like a skill—it has a displayed maximum damage in your skill page, but in reality it does damage within a lower range.
Because attune behaves this way, I think that it is also affected by the pvp damage nerf.
Also, take a look at these formulas for maxed out fire attune, fire bolt, and firestorm. As you can see by the
emphasized numbers, putting points in fire bolt first, and then storm, will lead to more damage per hit.
Level 50 Fire Attunement Damage Boost =
22.331*sqrt(
Focus) +
10.044*sqrt(
Fire Magic) + 307.16
Level 50 Fire Bolt Damage =
72.853*sqrt(
Focus) +
21.611*sqrt(
Fire Magic) + 264.84
Level 50 Firestorm Damage =
90.164*sqrt(
Focus) +
25.515*sqrt(
Fire Magic) + 365.43
Keep in mind that below level 60, your mage should have four fire attune rings equipped, boosting the skill by +14. But I still think that the order should be: max fire bolt first, max firestorm, and finally max fire attune.