The treatment is simply as I outlined - no stratification required. I have some D. cistiflora and soon D. pauciflora seeds that I am attempting to germinate and that's what I was recommended to do by a very experienced grower.
I would be careful with smoke treatment. I did read some studies recently on smoke treatment of seeds and they appeared to show a reduction in germination when applied at the wrong strength, for the wrong amount of time, or even using the wrong brand of liquid smoke (apparently the flavor matters.) If it's not required, I wouldn't risk it.