My guess is you can use a CC with different range values for triggering ghe articulations. Then you would “only” have to draw the values in the chosen cc lane in Play mode, instead of having to input playing techniques (that trigger the playback technique that triggers the keyswitch).
Not sure if I understand you correctly, but I guess I have set this up exactly as you say. I can draw in the values in the chosen cc lane in Play mode (that works), but I would like to trigger the articulations or better said the vowels (for example the aah, ooh and mmm) by writing in lyrics in the Write mode. Just like you trigger articulations with strings in your score (for example a dot for staccato).
Hope this makes sense …