I went with dry healing the first time, the second Ht I went with "almost dry" healing, I would immerse my head in the bath tub, 10 minutes lukewarm water once a day, lying on my back in the filled tub, my head tilted back. I think it sped up the healing, at the same time I got Ultra Refined techniques which did not happen the first time.
The laser comb is an expensive gimmick, some members bought it and reported it made their hair look and feel healthier but no regrowth.
The shampoos are not really worth the money IMO but they are not that expensive like the laser comb, some members like the way it makes their scalp feel but no evidence of regrowth.
Laser treatments, a member posted this very cool piece, I'll let you be the judge:
BBC Watchdog Laser Therapy Report
http://www.youtube.com/watch?v=HwWp5mlGtZU
The only proven methods as you said are HT, Finasteride/Dutasteride and Minoxidil.
Some Docs on our site like the laser treatments (not the comb), my feeling is they make your hair healthy and strong but that's about it.