I suggest reading this regarding YMT limits and gamebuilds.
You will always need to keep in mind that every cloth collection created for one gender, will end up creating 1 .ymt file. Additionally if you have special flags enabled for any of your clothes (Like ‘Is High Heels’, ‘Cut Hairs’ etc), one extra creaturemetadata.ymt file will be created. This one also counts up to the general .ymt limit per gender.
And you can read my tutorial regarding gamebuilds.