Sorry if I caused any alarm by my comment. I'm sure it's safe with a temp filler. I was just thinking needling would cause the filler to disperse, as in move under the skin, and that the radio frequency energy would cause the filler to be absorbed by your body faster. If it's been 5 months since your last Enerjet treatment, then I would think most, if not all, of the filler has already been absorbed.
I would ask if the doctor performs subcision on scars before scheduling a consultation. No point in wasting time and money to find out a doctor doesn't do the procedure. I've been on many consultations where I wish I had asked questions in advance because the doctor only treated acne scars with laser and wasn't willing to try any other procedure for scar improvement. Some dermatologists don't treat acne scars at all, and will tell you, you're stuck with them. If I were you, I would contact every derm and plastic surgeon in your area, and ask if they offer acne scar treatment and perform subcision on rolling scars.