I’ve had success with cow horn tip wolf howler( pm member Brad H made it), coyote vocals, Sceery AP7 rabbit distress, wildlife technology calls moose calf in distress, even squeaking has worked when I got in close enough. I was guiding and I wish I could say we shot everyone of those but we certainly did not. We mainly pushed the wolves on snowshoes.
As far as how long I treated it pretty similar to coyotes. I mean if you walk a long way in to a single calling spot you stay longer than average. If I know 100% wolves or coyotes are right there by hearing or seeing them I may stay hours but that is rare. Usually very similar to how long you’d stay for coyotes. No experience with lions.