Diablo® III

According to a friend of mine, who uses a barb.
There is a optimal attack speed for build and his was 1.38

I was thinking, what is the best attack speed for WD.
Of course the main drawback of too much iAS is too must mana cost
(which can be control with play style)
but other than that, more ticks in DoTs, and more hits with spiders and primary.

Any ideas?

I like to have an attack speed between 1.3 and 1.5. Any higher and it becomes too detrimental to my mana reserves.

Optimal attack speed is one that allows you to play the style you choose without constantly running out of mana.

That could be 1 APS, it coudl be 2+ APS.

There comes a point where you can't get enough mana to accommodate your attack speed because there isn't enough +mana regen in gear.
Unless you are only running BR+ROE and only casting WOS or only using abilities that cost less then 100 mana I wouldn't stray too far past 1.85 APS.

It depends on your build, with an onhit build like mine, faster attack speed is almost always beneficial as it means more life on hit and cc%. It's always dependant on your mana regen though. Because my build is relatiively low on mana usage and my mana regen is around 90, I have a higher ceiling to benefit from increased ias.

Once again, it depends on many things, namely build and mana regen. Under 1.5 ias would be really bad for my build.