@
bink
Regarding 'negative feedback loop' of haste on elemental focus. I believe your logic is flawed here on multiple accounts.
Firstly the calculation you are using is ultimately meaningless working out an 'effectiveness'. Net casts would be more useful.
E.G. if you have 50% crit your calc works out as follows:
40 spells per minute, 50% crit rate, 10 Lava Bursts = (10 + 0.5 * (40-10)) * 2 / 40 = 125% effectiveness ?! or 12.5% overall gain!?
50 spells per minute, 50% crit rate, 10 Lava Burst = (10 + 0.5 * (50-10)) * 2 / 50 = 120% effectiveness or 12% overall gain!?
You should be dropping the *2/n casts because it is meaningless.
Quite simply with 40 spells per minute and 20% crit you get 10lvb crits and 6 natural crits. That means 16/40 or 40% of your spells crit (this is important later).
and at 50 spells per minute and 20% crit you get 10lvb crits and 8 natural crits. That means 18/50 or 36% of your spells crit. (this also ignores that haste would give you slightly more lava surge and lava bursts.
You get more out of elemental focus with more haste, it is a linear relationship.
You acknowledge that your model also ignores back to back focus procs, but this favours haste as it reduces the % of total crits per casts as above numbers show which means that you are less likely to waste any focus procs.
Both of these relationships mean haste has nothing but positive impact on elemental focus, both increasing the net number of focus charges, and reducing the likelihood we will waste them.
If I've made an error in my assumptions feel free to let me know, if not I will be interested if this changes our stat weights.
Regarding mastery (and potm) I think it's clear that they should both effect more spells, mastery should extend to all spenders and potm should extend to all builders.