It can be done, wouldn’t recommend it for a full bleed, but for getting the air out of a factory bled system it’s fine. I use the top from a Hayes bleed bottle(had it lying around) screwed into the lever port to make a reservoir. Make sure there are no humps or high spots in the hose, and keeping the reservoir topped up, keep flicking the lever. Tilting the lever down while you do it will allow the bubbles of air an easy route out.
Also worth doing even if you have the kit, is to point the lever upwards and tap it before you finish the bleed, it usually releases a few more bubbles which I guess get trapped under the diaphragm.