Here you go:
Originally Posted by
onderduiker
Your main or primary weapon is whichever you equip first, regardless of whether it's in the left weapon slot (above gloves) or right weapon slot (above boots): when in doubt, remember the primary weapon is always displayed in the Barbarian's right hand.
The mêlée range of both attacks is determined by the main or primary weapon, so both have a chance to hit as long as the target doesn't move out of range while attacking.
The off-hand or secondary weapon's Increased Attack Speed isn't taken into account for Frenzy when the first swing doesn't hit: however, when it does hit, it is taken into account, and the length of Frenzy's attack sequence is calculated differently (only the primary weapon's IAS is taken into account for the first swing, while only the secondary weapon's IAS is taken into account for the second).
A note: When I talk about slow and fast weapons I mean only in terms of their base weapon speed (WSM), not IAS on the weapon.
When your primary weapon is in the left slot (above gloves), it doesn't matter which weapon base goes where - WSM is simply averaged. When you pick up and put down the left slot weapon however, the right slow weap (above your boots) becomes the primary weapon, and combined WSM is calculated by subtracting left slow WSM from right slow WSM and adding that to the average. I.e.:
AWSM = (right slow WSM + left slot WSM)/2 + (right slow WSM – left slot WSM)
This is WSM-bugging. If you've got a very slow weapon in the left slot and a very fast one in the right this can potentially speed up your attack by quite a bit: A [10]/[-30] setup has a combined WSM of [-10], while with WSM-bugging this is [-50]. This is true for Double Swing and the single-weap attacks like Conc and Berserk.
With Frenzy that subtraction is always factored into WSM, so you're better off equipping a slower weapon above gloves. It doesn't have that great an impact as with the other attacks, but it can still help:
Code:
With fully charged level 24-26 Frenzy (granting 44 SIAS):
[10]/[-30]
0 IAS: 13 frames
3 IAS: 12 frames
16 IAS: 11 frames
65 IAS: 10 frames
[-30]/[10]
0 IAS: 16 frames
10 IAS: 15 frames
20 IAS: 14 frames
38 IAS: 13 frames
58 IAS: 12 frames
89 IAS: 11 frames
249 IAS: 10 frames
I've tried to figure out what happens with WSM-bugging here but gave up.
Here as some breakpoints you might find handy:
Code:
With fully charged level 24-26 Frenzy (granting 44 SIAS):
WSM WSM IAS needed for
L-slot R-slot 5.5 5 frames per attack
------------------------------
10 10 89 152
10 0 63 109
0 0 63 109
5 -5 52 92
10 -10 44 92
0 -10 42 78
-10 -10 42 78
10 -30 16 65
5 -30 14 58
0 -30 15 54
-10 -30 14 44
-30 -30 13 35
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