User blog comment:ClariS/AD has Diminishing Returns!!/@comment-83.208.159.162-20120828093605

Actually, AD does have diminishing returns, only you have to know some math to understand how, to say that "with more ad your ad from every item looses its impact" sounds like nonsense but its actually true:

Basically, this is the reason why you build crit and atk speed, cos at some point, more ad is just nonsense unless youre old pantheon (i used to build 4 bloodthirsters on that guy :D) in a nutshell while 5*5=25 6*4=24, the point when your effective value of crit, atk speed and ad are the same, is when youre the most efficient, and possibly damaging ad carry.

So i think its legitimate to say so, but not in this way, would also be nice to run math on this, could you do this for us? I dont have engine, willpower or whatever to do so.