Well I'm in the same boat, but I'm at the end of a 16 week cut and I'm trying to get rid of the last 5-7 lbs or so. I have lowered cals to the minimum and cant go any lower, cardio couldnt be any more, and I already carb and calorie cycle. My progress has stalled so I'm refeeding big on Thursday. After that I start one last new shock technique for 3 weeks max: fasted cardio (oh no, not that!!!) Yep, 10g BCAAs, Caffeine, and Ephedrine HCL before-hand and then good breakfast with c/p/f afterwards. It wont be HIIT, I do HIIT on my higher carb days, but it will be about 20-25 min of walk/jog cardio to wrap this cut up and get down to 6-7% BF.
I dont advise this be done for more than 2 or 3 weeks though, especially on a pretty large calorie defecit diet. It's mainly just a final kick in the ass at the end of the cut. Last time I did this it worked well and I was as lean as I have ever been, so wish me luck