 There are sometimes variations if you're an old brick that's really, really a soft brick. Sometimes you go five to one or six to one, six parts sand and one part cement and one part lime. Lime tends to make it a little more sticky. It might make it easier to handle. So that's the kinds of mixes you would use for mortar. But I think I would go ahead and repair the loose mortar where it exists. But in terms of the reinforcement, I can only imagine how many different opinions you're getting here.