So due to my calcualtions -3% DW gives exacly same as Haste +3%.or
i got something wrong! lolz
Besides the tp difference, at 0 haste and 0 DW they should be exactly the same. However, you're more likely to have more haste than DW when doing anything with buffs. This is why haste usually wins. Otherwise, the way they affect DoT(outside of tp gain) is the same as long as they are in the same amounts.
But just to make it sure: DW will DECRESE TP gain? or it was Haste that do that? Cant find any info on this.
When trying to find how much TP per hit you'll have, follow this formula found here
: 5.0 + [(Delay - 180) * 1.5 / 180]
For the Delay in that equation, you need to add them together, then take the Dual Wield reduction from that. BD+SK and 23 DW would be 178+150= 328*.77 = 253(we truncate up, since it's a reduction), then divide that number in half(again round/truncate up), which brings us to 127 delay per knife.
So then(assuming I'm truncating right):
5.0 + [(127 - 180)* 1.5 / 180]
5.0 + [-79.5/180]
5.0 - .4
4.6 TP per hit.
As for the discussion of 4 haste vs DW Mirke, you have to remember it's 1-2 fSTR, 3 DW, and 12.5 ACC difference(as well as 2.5 atk). I made a post about it in the DNC forums here.
Basically, before DW is counted, Mirke with 10 acc gives 9% or more increase assuming you do not cap Acc, and depending on other factors like weapon base damage(I used 35 damage in my calc, but BD/SK get's a larger increase from STR). DW gives 3.896% increase from 20 to 23%.
So at a minimum, a DW Mirke that isn't wasted should give you 13% increase. In reality, it should usually give you more. I haven't been at acc cap for most things I go to, be it with Crab Sushi(birds, ~90%) or Pizza(everything else unless it caps me, then generally I use ATK food). So at what amount of haste does adding 4% haste bring you more than 13% increase?
To find the increase a delay reduction such as haste or DW, you need to subtract the haste amount from 100. The starting amount will be the number divided by the new changed amount(which will always be 4 less in this case).
At 66% haste, adding 4 gets you:
34/30 = 1.13¯, or 13.3¯%
To get 66% haste on THF before Rapp, you would need Haste, Haste Samba(fully merited), March 2x, haste spell, and 21% in haste gear before rapp(Speed/V belt and Dusk +1). As this is an extremely rare situation to be in, DW/Acc Mirke should soundly beat Rapp unless you cap Acc or are Zerging.