Hey. Lately i have been using a different Rona build from usual. I really wanted to make damage with red mist so i went /defence/boots.
With this build your red mist does 1000 damage per second to whoever is within. With armor reduction thats around 600 damage. Joule was op with 600 damage every 3 s and with Rona you can do it every second. I found tension bow 30 percent pierce to be more useful in red mist damage. You can replace one sorrowblad for extra defence if neccesseary.
The build feels good and plays well. You dont really suffer from not building attack speed. Her perk and b activation( increases attack speed) essentially make you feel like you bought it. Your first hits are slow but after you activate your b ability once , you have no autoattack speed problems whatsoever.