if you are going to pair the two at the same session, lift then HIIT
if you have the ability or time, separate them into two different sessions if it concerns you
either way, from my less scientific support and more personal experienced based view - lift then HIIT..only care to read further if you disagree
my train of thought - when you lift, I'm assuming that 'freshness' of body is more important for adequate completion of repetitions and maintenance of form..on the other hand, giving 100% intensity in the HIIT session can always be 100% of whatever state of body you are in at the time...percentage of a 1RM is more solid and calculable, while percentage of intensity is relative and vaguely measurable from one session to the next, especially when the goal is to push yourself to the limit (said limit fluctuates rapidly based on diet, time of day, rest, mental drive, etc etc)