Sorry didn't get back right away.
Kind-of a loaded question. I mean "no" if you're not interested in developing more #1 ranks then you currently have. Unfortuately clients tend to be more "that's great - but what can you do for me here"?
If you have followed a websites progression - you tend to have an understanding what pages are out-performing the competition and which ones don't - this ones that are "way ahead" can assist ones that are "way behind".
You could just keep developing "more links" and the same effect will occur but the latter tends to be "the harder road to go"... but if you have stacks of time to play with -- the latter is probably be a better way to go.