I wanted to share a snippet on this finding I made whilst trying to verify the value of [spell]improved icy talons[/spell] in my previous analysis.
I thought at first Kahorie’s had a bug in the way it handled melee haste, because I was seeing a disproportionate increase in mainhand damage, beyond the 20% a windfury buff should give. Simply turned out I wasn’t adding [spell]rune strike[/spell] and mainhand hits together before checking they had increased by 20% (oops).
So, what’s cool is that a similar test lets us look at how much rune strike increase you get from melee haste. In theory, it should be notable because you can take advantage of more RS opportunities as your swing speed approaches that of the boss’. This is one reason dual-wield is pretty sweet; with enough runic power you can succesfully proc against more of the fast-swing speed ICC boss’ attacks.
If the boss has a 2.0 attack speed, and you have a 30% combined dodge and parry in Icecrown, with a normal two-handed swing of 3.6, then you get windfury: rune strike hits increase by 3.7%.
Against a 1.5 speed boss, rune strike increases by 7.3%.
This is why raid melee haste is so hawt (not haste from items, it’s too weak; you need a massive boost like windfury or imp icy talons to make a appreciable difference to rune strike).
This effect has lifted the value of IIT inside Icecrown, because bosses hit faster.
More analysis another day; I wanted to share this quickly.