Treck wrote:Im not doubting your math, im just very suprised at the mastery vs avoidance correlations.
I thought 122mastery would be a lot better than just equal to 132 avoidance rating.
Keep in mind that you may be talking about two different things. Mastery is better point-for-point than avoidance rating for reducing incoming damage after around 10%, but it's not ahead by very much. So when comparing mastery to avoidance, a slightly larger amount of avoidance will generally come out ahead. In this case, it takes 114 mastery to give the same damage reduction as 132 avoidance rating, which means the mastery is about 15% better at reducing damage intake point for point. Since one belt has more than 15% more avoidance rating than the other belt has mastery (132/95=1.389, or +39%), the avoidance belt will do a slightly better job of reducing damage intake.
However, that's just reducing damage intake, which may or may not be a relevant comparison for gearing. The mastery belt is far ahead in combat table coverage (CTC) because mastery is 2.5-3x stronger in that department rather than 15% stronger. Ala Digren's math, the 132 avoidance from the Conclave belt gives 0.5713% CTC, while the 95 mastery on the Jumbotron gives 1.19%.
Most people would argue that the extra CTC on the Jumbotron makes it the stronger choice, and I think I'd agree for the most part, though the difference is quite small. Either is an excellent belt. The Thunder Wall has the added advantage of versatility; as you pull ahead of the block cap, you could un-reforge back to pure avoidance for larger total damage reduction with no loss to CTC.
This is the difficulty of saying one belt "wins," or even that one is hands-down "better" than the other. You need to be very clear about what metric you're using, because not all metrics are created equal. A cat might be a "better" pet than a turtle because it's more entertaining, but that metric is of little use to the person with severe fur allergies.
I can (and have) given you very accurate equations for measuring relative damage reduction, and I could probably give you accurate equations for how mastery "smooths" damage input (TODO: do this), but I can't give you accurate equations for how "smoothing" damage input affects the reaction time and play style of your healers, or which one gives you a better chance of killing the boss.
