Boylston's Quad-box Shaman Rated Battleground Compendium

[Boylston]

Cataclysm's Mastery Mechanic

Elemental Overload: Grants a 16% chance for Elemental Overload to occur. Elemental Overload causes a Lightning Bolt, Chain Lightning, or Lava Burst spell you cast to trigger a second, similar spell on the same target at no additional cost that causes 75% of normal damage and no threat.

Each point of Mastery increases the chance of Elemental Overload by an additional 2%. (Note: 179 Mastery Rating = 1 Mastery Point at L85. (double check)).


Some Sample Mastery Math: with a 4xShaman setup and the default 16% chance to proc an overload, you can expect the following results for each volley of spells:
P(no overloads) or P(0) = 50%
P(1 overload) or P(1) = 38%
P(2 overloads) or P(2) = 11%
P(3 overloads) or P(3) = 1%
P(4 overloads) or P(4) = 0.065536% (Get a screenshot!)
P(any amount of overload) or P(1-4) = 50%

Just a little bit of mastery changes things slightly (20% overload chance):
P(0) = 41%
P(1) = 41%
P(2) = 15%
P(3) = 2%
P(4) = 0.16% (Still, get a screenshot!)
P(1-4) = 59%

Mastery heavy, but not crazy (25% overload chance):
P(0) = 32%
P(1) = 42%
P(2) = 21%
P(3) = 5%
P(4) = 0.4%
P(1-4) = 68%

Go crazy with 20% mastery bonus (36% overload chance):
P(0) = 41%
P(1) = 38%
P(2) = 32%
P(3) = 12%
P(4) = 1.7%
P(1-4) = 83%



Note: I am in the process of building a simulator/calculator for comparing Mastery, Crit, and Haste (mostly Mastery and Crit, however).


.