I'm going to suggest the same rotation I've suggested to other people.
In general, 5e classes and subclasses are either how you combat or why you combat. Classes where both the class and subclass are how you combat tend to be a bit hollow (the Fighter is an example of this).
Okay, I've been puzzling over this for a while now. I'm not quite sure what you mean. Can you give some examples of existing "why you combat" subclasses?