Whether he needs to work on take downs or more effective guard pulling depends on whether his strength is his top game or bottom game. Based on his previous posts it seemed his strength was his guard game. If this is the case, then his first order of priority is being able to get his opponent into his area of strength. After gaining this capability then by all means work on take downs in order to supplement and expand his game.
However, it should be noted that it is not vital to have a take down game to succeed in tournaments if your guard is good enough.