Fire Mage 25% Haste Cap: Why 2005 Haste Rating?

[Andefico 1]

Hello again everyone,

After studying the guides here in detail and reading about Fire Mages on the internet, there is something I don't understand.

I imagine that you are using the formulas from Elitist Jerks to compute the haste values for the caps, see there: http://elitistjerks....#Haste_and_DoTs

If I follow the formula for calculating the 25% Haste cap (13 ticks of Combustion), I need to do:

tick_speed_required = (10 * 1) / (13 - 0.5) = 0.8

then

haste_percent = 1 / (0.8 + 0.0004999) = 1.249219253581752

So I need to reach 24.9219253581752% Haste to get to that cap (according to EJ formulas). After I remove Netherwind Presence and the 5% spell haste raid buff, I obtain

haste_from_haste_rating = 1.249219253581752 / 1.03 / 1.05 = 15.50802159794282%

As far as I understand, I get 1% spell haste whenever I stack 128.05716 Haste Rating (so they say on EJ), so this means 1985.9 or 1986 Haste Rating to reach 15.50802159794282% Haste. In this case, why does it say 2005 on EJ and everywhere else on the internet, including on the guide here on Icy Veins?

I hope you can help me

Edited June 25, 2012 by Andefico

[LCSscallywag 57]

I'm not quite sure but I do know that if you have two piece T13, you only need to get to 1505 haste cap due to the tier bonus.

The catch is, there are different soft haste plateaus that will give you an extra tick of combustion. Go for the lowest and if you can still hit the next one without sacrificing crit or hit then go for it.

[Damien 1,514]

That's an interesting question. The formulas they give on Elitist Jerks are correct, but there is one case that they do not properly mention.

Usually, when you compute tick_speed_required, you get something like 1.8345432 second and you need to only keep a precision of 3 digits, so 1.8345432 becomes 1.834; in the same vein, 1.8319999999 becomes 1.831 (and not 1.832). It's not a rounding operation.

If tick_speed_required is an exact value, like 1.125 or 0.8, you need to remove 0.001 before proceeding. Don't ask me why, it's just the way it is.

In the case of the 25% soft haste cap with Fire Mages, you need to do:

tick_speed_required = (10 * 1) / (13 - 0.5) = 0.8

0.8 is an exact value, so we remove 0.001 before moving on, which gives 0.799

haste_percent = 1 / (0.799 + 0.0004999) = 1.2507818950321319

haste_from_haste_rating = 1.2507818950321319 / 1.03 / 1.05 = 15.65250994286933%

To obtain 15.65250994286933% Haste from Haste Rating, you need 2005 (2004.4, to be precise) Haste Rating.

[Andefico 1]

Thanks for the explanation. I never imagined the formulas could get so complicated...