Albuterol is good and pretty mild as far as sides. If you run Ketotifen you can run it a pretty long time with no down regulation of the receptors. I only use pharma for both. 4 mg of Albuterol 4x's (16mg daily) a day combined with 200 mg of caffeine works very well spread out during the day.
Clen is slightly stronger but the sides are shitty.
I will suggest you try Yohimbe HCL with everything else. Take it fasted prior to cardio or training/cardio or it won't work. Do some research on it so you know how much to take so it's effective. It can actually assist in getting the body to release the "hard to burn" fat so it can be burned. It's cheap also.
I'd bet you are not as lean as you think you are if you're seeing any actual abdominal fat on top of the abs at 8%. You're describing areas that normally lean out first so relax, you're on the right path but still have a ways to go. Cycle your carbs to keep your metabolism running strong, stay in a deficit at least 5 days out of the week but that doesn't always mean eat less food. Too much cardio, especially that mid-range (above low steady state but below HIIT) is actually probably hurting your progress. So on and on.
Getting down to actual 3, 4, 5, 6% and less is a long term thing that takes a lot of effort and time.