Hi RandomThinker, welcome

I'm not the same skin type as you, but my attitude to exfoliation is to do what you can without causing any irritation. That said, I'd say start with the Clarisonic once a week for say a month. If you're not getting any irritation and you're also not seeing the results you want, up it to twice a week for a while and see how that goes.
You've got to find the balance that's right for your skin by experimenting! For example, I have slightly sensitive skin and for my skin type, exfoliation isn't recommended. Yet, if I don't exfoliate my skin is a mess. So I have to adjust my exfoliation according to how my skin is feeling.