Need Help With IAS Breakpoints

[ambush]

So I was looking for guides on Zeal and Smite IAS Breakpoints, but I couldn't seem to find any. A lot of the build guides suggest what gear to use that stacks IAS but Id like to know what the breakpoints are if I want to put together my own gear set. If there is a guide, can someone point me in the right direction, and if not does anyone know where I can find out this info?

[importpsycho]

http://diablo3.ingame.de/tips/calcs/weaponspeed.php?lang=english

[BoWxRobbie]

BTW, if your going to be a smiter/zealer with maxed Fana, At level 25 Fana with a PB you only need 10-15 IAS to get the fastest speed.. so if you have fana n pb, IAS shouldn't be a problem