farmquilter

I see janjanq asked about cotton fabric quilt blocks. But I came to see what would be recommended, needle etc, to use my embroidery machine to quilt single blocks of a t-shirt quilt. The quilt will be done in the rag style, GD just approved this look for her graduation quilt.
I already have the fusible on the backs of all designs we want. The blocks are NOT all the same size. I will use a poly batt and t-shirt fabrics on the back. Do not want to do the 'X' in the blocks so was thinking to do some embroidery.
Would like some advice on what others have used, with success, before I start a test sample.
Do not want to do any complicated stitching.