PLEASE KEEP IN MIND: ATTACK ON GEAR DO MATTER AT A FRACTION OF YOUR WEAPON IAS.
Depending on the base attack speed of your weapon, you may need 80+ ias from your gear to actually obtain a single increased attack frame. In other case 40 or 60 is enough.
If you arent sure, simply google d2 ias calculator, and do tests.
Credit:
Drawing at the end by: Lulybot - [ Ссылка ]
![](https://s2.save4k.org/pic/7unvHWbkGc8/maxresdefault.jpg)