I use clean/dry compressed air.
I think a leaf blower is too unwieldy/awkward.
I use a blow gun with about 2.5 feet of soft/flexible plastic small diameter hose pushed well over the end of the blow gun's metal tube.
I hold the blow gun in one hand, whilst holding the end of the plastic hose in the other to dust off with a sweeping motion.
This setup it also unsurpassed for blow drying and blowing water out from under rubbers/mouldings and into/around crevices and badges after washing the car.
It's sort of a roving hose setup for compressed air, which will reach everywhere and it's safe for use, because the end of the hose won't damage paint in the event of a potential accidental touch/strike on the paint.
Handy if your paint is polished to perfection.
As far as dust attraction is concerned, outside of environmental considerations/circumstances at your locality.
It can also depend upon what wax one is using.
A Carnuba wax can be a little bit static/sticky and it can attract dust depending upon the brand and type, where as a synthetic wax/sealant can be more resistant to dust attraction so it can be less of a problem. Again depending upon brand and type.
Because I prefer to use a Carnuba wax, and sometimes dust will remain after the blow down.
I have also been known to give the vehicle a very light "sponge bath" with a very soft/plush microfiber wash mitt( The AquaTouch Ultra Microfiber wash Mitt is the absolute best I've found).
The sponge bath doesn't use any water sprayed out of the hose, as using the hose would basically be going through the same rigmarole as a complete wash/dry process again.
I simply use a clean wash water mixture in the bucket with fairly hot water to wet the mitt, then I squeeze the mitt out until it's only damp.
I then lightly drag the mitt over the paint, in order to just pick up any remaining dust which may be left on the surface.
If the mitt is well squeezed out, the moisture that's left after the mitt has passed over the paint will flash off very quickly, and leave no water marks on the paint if the car wash is of good quality.
I find a light sponge bath to be quicker than using a quick detailer spray and potentially inducing micro-marring, by to buff the quick detailer spray off the paint.
15 minutes later with the light sponge bath, and your on your way with a first class job.