I'd suggest using the DMC Cotton Perle 12 for the final Brode, buttonholing over it and making the picots over it. Use a double length of the sewing thread for the couched outlines if these are the only threads you have available to use. I look forward to seeing the lovely pieced stitched.
thank you for posting the stitch diagrams. But we must be careful only to post pages from books is the book has an expired copyright. I think 1923 is the cutoff year. What is the publication date on these books? I understand you are eager to share something, but we must no infringe copyright.
Welcome. Please read all the NOTES. They explain our policies, the laces we include, and how the software works. Join any groups that interest you. Post some photos of your best pieces. If you have any questions about the site, contact me and I will try to help.