I'm lazy to create an account to post at dota-allstars.com, so I'll try to ask this here and hope someone has the answer...
Whatever attack speed you get (agi or items), you _add_ it to the IAS factor for your hero (eg. treads give 30% IAS => you get an IAS factor of 1.3).
Question - using example (easier to explain):
Now I know N'aix gains about 4 agi per level, so that adds 4% IAS to his attack speed every level (which is why he is very fast at higher levels). MY question is, N'aix starts with 21 agi (IIRC) at level 1, does that get included in the starting IAS factor (meaning he starts with an IAS factor of 1.21, then +0.04 every level)?
(Additional info you don't have to know to answer my question)
By IAS factor, I mean the number you divide by 1.7 (Base seconds per attack for N'aix) to get the "Attacks per Second" rate (1/1.7 = 0.58). That is, with 30% IAS, the attack speed would be 1.3/1.7 = 0.76 attacks per second.
Does anyone understand what I am trying to say? Haha sorry if it's a bit too technical.
No. At lvl 1 you are only attack at the speed of BAT (Base attack time). The +IAS only start at lvl 2.