Lyrics and slurs and articulation

[Jean-Alexis Montignies]

Hi!

How would I use a different articulation for the score and the lyrics?

I'm writing a score for a jazz standard.

On the three first notes of the theme are to be played legato, but with a 
sylable on each note. I tried a phrasing slur, but then it collides with an 
articulation (I'm using 2.11.33).

In other places, I would like to put a single sylable for three notes without 
printing a slur.

Would the easier thing to do to create a hidden melody used for the lyrics? 
How to achieve that?

Thanks!

Jean-Alexis Montignies