Hi Angelina,
I always use Aurifil 50 wt cotton for piecing. It is very smooth and very low lint. One of the reasons it works so well for piecing is that it is a bit thinner and thus you are able to press your seams very accurately. However, I would think a size 10 needle is too small. I use a size 12 for Aurifil. I only use a size 10 when I use Superior's 100 wt silk thread, which is VERY thin. On batiks I use a size 12 sharp needle with aurifil 50 wet, these are also called microtex sharp needles and seem to make a smaller hole in batiks.