It depends on what you're caloric needs are. If you need 2700 calories to maintain you weight, and you're currently consuming only 1700, then even on a cycle, you will NOT build any muscle mass. You have to have an adequate number of calories, ie > your caloric basal requirement to build muscle. To lose fat you need to eat at baseline or lower.
Halo may help you keep what muscle you already have while cutting, but not gain any new muscle. What are your maintenance cals?
Nice! Granted, fat loss will reveal the underlying muscle, and there is muscle memory to consider. But either way, sounds like you're doing great. Just something to consider: I usually have clients cut 500 cals from maintenance, while running an anabolic...plenty of fat loss and nice muscle revealed...but whatever works for you!
