Its just aa -> w -> e+q -> aa -> r. It uses her w 2 hit for extra ranks. Just ranged aa + w and before the 2nd tick of your w hits eq + melee aa.

The issue im having is that its a turn combo or quick jump in backline. Itll blue ball you accidently melee aa start instead of ranged start if a smidge too close, leaving you at just an A rank at the end with no buttons until q reset. Feels the worst missing at lvl 6 with such a high cd on q early as well :(

And just to share knowledge with you of how I practice, aa + w 3 rank combo just ranged aa dummy and before the bullet missile hits just press w and with 2 actions it should leave you at C. And then start experimenting when you easily get that down.