Laser settings scalp

I am a black male who has been getting laser hair removal on my scalp for the past few years. So far so good. Most of the hair is gone. I would say 70-75%. My scalp is more visible than hair and what is left are single hairs spread all over the scalp. The last few hairs seem not to be responding even though the hair is still coarse.

I want to up the settings but my laser technician is wary. I am being treated currently at 30J/15 spot size on a Candela Yag Pro. I have absolutely no side effects and it really does not hurt, but my technician is afraid going to say 34J might cause burning. So far I have not had any skin issues on my scalp. The last two settings at 28 and 30/15 spot size has resulted in the hair shedding but pretty much all growing back.

I know Romeo once said on a 18 spot size anything 24 and below is useless but my technician again is wary of going that high. I have also read research by the NIH that shows the higher settings results in more cleared hair.

I know most people here do not like giving settings but what settings would you suggest? I have a session in two weeks and my technician says she would want to talk with someone who recommends higher settings before she considers it.

If not higher settings what about other settings like pulse?

Thanks.