Ravana was a good tactician . He sent Indrajit first to destroy the army .He started realising that Rama is no usual warrior so he deliberately woke kumbhakarna up . But he never sent a combination of warriors to attack sri rama together . In that case his probability to win would have been more .
Was narayan talking to him in his own method that come home dear its too long you have been in the pain of bandhan ? Was narayan crushing his ego slowly ?