How to use the new Leblanc?

Hey guys, Asuka Akashta here. I am by no means a "good" player at league, relatively. I am only Gold 5 :P HOWEVER, I have a lot of games on Leblanc, and 400k mastery points to back it up. I KNOW how to play Leblanc, but it wasn't always like this. The first time I played Leblanc, her kit just didn't make sense to me, but it seemed to make sense to everyone else. I tried and tried but to no avail could I figure her out. And then one day... it just clicked, and I knew how to play her! Since then I've picked her up as my main and I can perform well with her 99% of the time. When they announced that Leblanc would be one of the "Big 4" I was excited, yet scared at the same time. I didn't want them to ruin my baby. When I finally found out about her reworks, I was ecstatic! I thought it was a super interesting kit, with multiple deceptive tools and counterplay. However, I for the life of me can not figure out how her damage works. I can tell that a majority of it is frontloaded in her passive, but I just can't seem to perform well on her anymore. I know she's going to take some getting used to, but everyone else seems to get the gist of it already, and what does that say about me if I don't? I realize that she isn't just a, "Oh look, an ADC (BOOM)" and they die, shes more of a thought out killer now... but how do I go about assassinating someone, I feel as if it takes WAY TOO long, because having to wait for that passive to proc ect. Meanwhile other Assassins seem to have the same amount of kill time as they did before the update, meaning if you get engage on, you have no counter other than to run away, because you won't be able to get your damage off effectively. Anyway, I was wondering if any of you lovely people on the forums have found out how to master this new reworked Leblanc.

Is there a certain order of spells you should be using anymore? Which spells do the most dmg? Does it matter which spell you use to proc the passive? Any other tips would be appreciated as well! ect. Anything would be greatly appreciated, thank you :P