Weight traininig should almost always come first so you have maximum energy to apply to it, to maintain good form and adequate intensity to provide optimal stimulation for maximum strenght gain and maximum stimulation of the hormones that cause fat loss. HIIT only needs to be performed 2 times a week for optimal benefit. If you want to do something 3-4 times a week you might try one steady state cardio session once a week and maybe a circuit training session or just a higher volume resistance session another time.
