Found out that Genjus will STILL learn things after level 20. At level 10 they learn their first skill, and then at 20 they learn another for a total of 3 actions. When I saw nothing new at 30 I figured that was it. Lo and behold that at 40 a new skill is earned. The skeleton learned a new skill. I wonder if they get something at 80? Or maybe 60? It'll be a while until I find out.