About the lich bane you have included in your build, I don't care who you see doing it whether it's a pro or even just professor akali, lich bane is not good for akali anymore do to her rework and it shouldn't be used it is just wasted and doesn't even help that much when you could be getting other items that do more damage, i know that professor akali is a very good player in league and that's what most people want to be good, that's why they watch bigger people to see what they do, you should be building off of experience and what works best for you, not what other people do, so I hope that I helped you understand even if you don't take my advice, have a nice day.

What is the combo for akali?

You only showed people your idea of item and skill choice... there's no actual guide here lol..