There's a set of Chinese health exercises called the '8 Brocades', or more accurately, 'The 8 Pieces of the Brocade'. 8 of course, is a most auspicious number, and the basic idea is that the weaving together of these 8 exercises creates a whole - the piece of brocade in question.
I'm not sure whether the attributes that come together to make a skilled duelist are going to tie together so tidily, but here are the 'fields of inquiry' that I've organized in my mind when I teach.
Weave the parts together, and perhaps you'll have something worth wearing :-)
Accuracy - Targeting and technique (Both weapon dependent)
Understanding Space - Geometry, range (many), safety, danger, opportunity.
Understanding Rhythm - Natural rhythms, blending, breaking, lengthening, shortening, smooth and sudden.
Understanding Physiology - Possibilities, agility, power of weight/gravity, torque and structure.
Understanding Psychology - Human tendencies, freezing, aggression, taunting, baiting, weakness, strength.
Lying and Acting - Deception, illusions, gifts, set ups and traps.
Understanding Weapons' Design - Movement through space, recycle, qualities, features and flaws.
Understanding Relationship - Following, leading, reading and 'writing', time/space.
Understanding Asymmetries - size, height, angle, personality, skills, weapon(s), numbers.
The simple act of blocking, say, can contain many, if not all, of these elements, whereas a totally random flow can be a vehicle for focusing in on only one.
Ultimately everything is interrelated to form the whole, and my job as a teacher is to create meaningful ways to see them all.
Feel free to add if I missed something