I fly 8 different 47s and they ALL start differently!
Either technique is fine. Some start better with boost pump off, some with it on. But they all are buggers if you over prime so watch that one.
If you're priming with the throttle I find it's often better to prime it with the collective fully raised. Make sure you also have throttle in the right position for start (about 1/4 open - you should be able to feel the 'flat spot'.
Have fun flying a fab machine!
MB