I just brewed this yesterday. Thanks for all the great info, the starter worked just like expected. I kept it in the garage to keep warm, not too hard to do in south Texas. So far so good.
I added a pound. If you already used the candi sugar, it might be too much. You could always brew it up again with the piloncillo and compare. It was 10% of my fermentables.
I just added sugar to a saison, it picked back up pretty quick. I boiled it just long enough to fully dissolve, not long enough to start caramelizing. I added it after one week in primary.