Those are decent linear scores on his parents and him. What are your breeding goals?
We have a mini-nubian and she has been bred every year to standard size bucks and delivered without any problems. You will have to decide if it can work for your MM but I haven't had a problem breeding to standard bucksI would not personally do that. I would worry that the kids could be too large for them to deliver safely, but I don't know much about mini lamanchas, maybe someone else can weigh in on that.