When trying to cut down do you prefer to use HIIT or just normal cardio?
Neither. If you have your diet 100%, you don’t even have to look at the treadmill. It’s a simple case of calories in vs. calories out. If you consume more calories than you burn, you put on weight. If you consume less calories than you burn, you lose weight.
What cardio does is help accelerate burning those calories, but if you are already under your caloric maintenance, there’s no real need to do any cardio, although it can bring about fat losses much faster, you may also find it to be catabolic (muscle-wasting).