Originally Posted by Deridian
I am probably missing something
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You are indeed. You're comparing :
- energy regen with Ascension and 4500 haste
vs
- energy regen with Power Strikes and 0 haste
You should be comparing with 4500 haste in both cases.
Energy regen can be calculated with the following formula :
reg(h,a) = 1.1 * 10 * (1 + h/42500) * (1 + 0.15*a)
where h is Haste rating and a is whether or not you have Ascension (a = 0 or 1).
Using your method,
if Power Strikes is 2 energy per second, then you need to compare :
1.1 * 10 * (1 + h/42500) * (1 + 0.15*a) where a = 1
vs
1.1 * 10 * (1 + h/42500) + 2
I skip the calculation and move on directly to the result :

You need 9015.15 (that's 9016) haste for Ascension to be better.
But the "IF" statement i've underlined is true only if you are hit/exp hard capped. Otherwise, 40 energy does not equal 1 Chi. Let's see how we can deal with non-capped situations :
t = hit rating (i don't take h, because h is haste)
e = expertise rating
hit(t,e) = chance to land a successful attack
- The average cost of Keg Smash is 40*hit(t,e) + 8*(1-hit(t,e))
- The average cost of Jab is 40*hit(t,e) + 48*(1-hit(t,e)) = 40 + 8*(1-hit(t,e)) note that this is not true, because Jab can miss several times before you land it successfully, each time costing a further 8 energy, but for the sake of simplicity and realistic calculation i'll consider it can only miss once. Even with 0 hit/exp, it's very unlikely that you'll miss two consecutive jabs, it will happen once in a week, so i'll just neglect it in the calculation. It would really be silly to calculate 40 + sum(n*8*(1-hit(t,e))^n ; n = 0..infinity) as an average Jab cost ; you just don't miss that many Jabs in a row.
- I take the use of Expel Harm (eh) into account in the calculation, but it has no influence over the ending result.
The energy that's left (per second) if you use KS evey 8 second is :
reg(h,a) - 40 + 8*(1-hit(t,e))
You just have to divide it by the cost of Jab, and you have the number of Jabs per second :

Then you can easily calculate the Chi generated per second, adding jbps to the KS generation, which is 2*hit(t,e)/8 Chi per second (2*hit per 8 seconds), and add the Expel Harm Chi :

where p is, similarly to a, whether or not you have Power Strikes.
We can now solve equations, by calculating the Chi gain of chps with Ascension, and compare it to the 1/20 Chi gain of Power Strikes. Here is how i got the result of 9787 with 7.5% hit/exp :
And observe how wonderful Mathematics are when you harcap :

You get the same 9015 we found with your method of energy comparison.
But here we are just looking at average Chi generation and energy equivalence. The choice between these two talents also has consequences on other things like dps, number of Tiger Palms, and a few other "details".