Of course this is good advice, Helaman and Shiblon are faithful, and they will guide Corianton. The more important question is why Corianton would not go to Alma. The answer is that Alma does not expect to be around for much longer. While Alma will be around through the end of this current year, the eighteenth year of the reign of the judges, he will leave, never to be seen again, early in the nineteenth year (Alma 45:18). Thus Alma is giving his sons a final blessing, and in Alma’s absence, the older brothers will be the source to which Corianton will need to turn for spiritual guidance.