Attack Speed Reference

Im glad aran skills work right but thats totally not my point. According to lazybui (unless im reading it wrong) the skills itself take 30ms less time when being used repeatedly/ when holding your attack button. Im using aran as an example because they dont use the Same attack over and over again but combine multiple attacks. Im not saying it doesnt work for aran but the topic writer does not indicate if it works with combinations of skills without time intervals.

I hope somebody can clarify what exacly those 30ms are and if they work for aran too.. Also im wondering of it works for faster 2 capped attacks