Alma 4
It appears that Alma had more work as the chief judge during the first five years of the judges than he did as the high priest. Starting in the sixth year he seems have more work as the high priest than as the chief judge. Maybe this helped him to see how much more rewarding and straightforward this work was when the time came that he saw that he could not do both. On the other hand, perhaps the decision was simple when he had to make it – he was consecrated and called of the Lord to be the high priest while he was elected and chosen by the people to be the chief judge.