I'll tell you my experience. I can get on foil with the parawing in 10kts with a 4.0 Gong Plus with my downwind gear (7'6"x17" - 95L and 960R). With this set up I can get on foil with a 4.6 wing in maybe 6 knots. In my opinion, the technique of getting on foil with the parawing is closer to getting on foil with the paddle then with the wing. I'll normally try to accelerate at a beam reach without pumping. Once I've the board moving, I'll wait for the chop, let pass the first, go to a broad reach and start pumping uphill with both the pw and the legs and take off downhill when the chop pushes you. Here I've a little clip that shows how.... I hope it helps!!