I maxed out everything and had so much leftover stuff too

>>346945614
The base and the clothing will have 2 separate armature when in Unity. You'll need to combine them somehow which is usually simple. There's tools on Booth that you could use for Booth outfits but would work for this probably, I forget the name of them though. Otherwise simply reparent the whole outfit to your base and reparent each of the outfits bones to the corresponding bones on the base armature.
But dont do this, what's the point. Just export the base and clothing together from blender. It's easier and more optimised