The Steeles 11 East bus goes to Humber North directly. Assuming that there is a dropoff point near Steeles & Highway 27 (likely), it is a two kilometre walk to get to Steeles and Kipling, where the 45+ picks up. Then, about halfway down Kipling, there would be a transfer onto the 44+ (which goes to Humber at Lakeshore).
By my reckoning, if the buses run at about the same speed in Toronto as they do in Brampton (and the 11 travels at roughly the same speed as the 77), that would be 66 minutes of bus time plus 20 minutes of walking from Highway 27 to Kipling.
I think.