When using knite, I always use a ballpoint needle, otherwise it sticks and makes the tension crazy. And I keep the woven side down because I don't have differential feed dogs on my sewing machine (uh, the bottom fabric should be the least amount of stretch so that it doesn't pucker or ruffle).
And use the needle for the heavier fabric (like denim & ribbons) otherwise, the needle won't pierce the heavy fabric. If it's a really flimsy fabric, you can use a stabilier or stabilizing strip of fabric to bulk it up on the seam (or handsew).
Serger rules are the same