Resuming Laser Hair Removal - How Should I Proceed?

I am planning to resume my laser hair removal treatments and would like to share my previous session history to get your expert advice: • Session 1 (March 7, 2023): Deka device — Full arms, full hands, and full legs (including thighs). No bikini. • Session 2 (May 27, 2023): Included bikini. Settings: Left hand 9, right hand and legs 8, bikini 6. • Session 3 (August 8, 2023): GentleMax Pro device — Legs (front and back) 16, hands and armpits 12, bikini 10, deep bikini 9. Overall, I achieved about 30% to 75% reduction across these areas. I noticed a massive improvement and significant change after my last session compared to the earlier ones. Since my hair is now much finer and lighter than before, I have a few questions: 1. Energy Parameters: What energy (joules) settings do you recommend I start with for each area? 2. Abdomen Treatment & Vellus Hair: I want to start treating my abdomen as well. The hair there is considered vellus, medium in length, and ranges in color from gray to light-black. Is laser treatment effective for this type of hair, and how can it be targeted safely? 3. Device Selection: Considering my hair has become finer and lighter, which machine should I use moving forward (Deka or GentleMax Pro) to get the best results? Thank you for your guidance.