What effect will Subcision have on collagen after Fraxel Laser?

I heard that subcision followed by Fraxel Laser has had great results for acne scar patients (I am not sure if this is in the same session or separate). I have had 5 Fraxel treatments, and it has been over 4 months since my last one. Is it alright to have subcision now (in reverse order)? What effect, good or bad, will subcision have on the collagen remodelling process initiated by Fraxel? How about other treatments such as TCA cross (medium to deep peeling)?