If dhyana is gained there is no need for anything else.

Devotee:  What rite or action is necessary for the development of dhyana?

Ramana Maharishi:  Dhyana is itself the action, the rite and the effort. It is the most intense and potent of all. No other effort is necessary.

Devotee:  Is not japa necessary?

Ramana Maharishi:  Is dhyana not vak (speech)? Why is japa necessary for it?  If dhyana is gained there is no need for anything else.