9 of my elders are master parents, researchers, and farmers. Those seem to be the easiest skills to accumulate. Usually, when I have a villager that is already a master in two skills: they still aren't master parents. So I take that villager and constantly drop it on another [a female over 50 for no babies & if it's a male] for about 5 minutes straight. Soon, they are esteemed elders!

If your two are already master parents, I'd be stuck! *lol*