Since it seems that a lot of the body is covered in hardsurface..maybe you want to have a look at modelling/sculpting the cloth as opposed to using Marvelous? I would be a great learning point as well, especially since this is a personal piece(?)
A little update on a project I am working on. finished off the high poly sculpt of the armour and started on working on the underclothing. The last day or two all i have done is make the straps, buckles and fasteners that hold the armour together for the low poly and finished the high poly armour sculpt. The clothing I was…