I always chose the melody syllabus (as opposed to the song-to-words one) although it's your own preference.
Since the first one or two bars were already started for you, I usually repeated the pattern but a note lower/higher, i.e. in a sequence, and changed bar 4 so that it led up to the dominant note. Then for the next three bars, I used sequences again, and in bar 8 I tried to make a Ic - V - I progression (kind of; though only with the melody notes). I only got 12/15 though, so it may not have been the best approach.