Ok, I did a Bing search of the quilt to study the images. An easy way would be to emphasize the small squares which form diagonal lines, and quilt a straight line down the middle of them. If you want more quiting, then quilt on either side of them, following the points. Then I would stitch in the ditch around each square of the Churn Dash block. After all that, the only part not quilted is the four "setting" triangles around each Churn Dash. Stitch in the Ditch is easier on a dsm than on a longarm---not sure what you're using. If a longarm, you could do continuous curves instead---much easier and faster on a la than s.i.t.d.