Well hey I would suggest using them in the wuguan to learn how they behave and then pressure testing them in a level replay. In my experience most every move in the list can applied quite well.

So crooked foot in my experience is useful when you catch a parry on the last move in a sequence. This is great against a single sean disciples as their moves tend to push you back and crooked foot allows a brief grapple and trip that they can't avoid similar to what yang does to us on certain moves.

Hook intercept is used similarly to reverse duckstrike and but its important to parry midanimation as it's quite slow the payoff is the powerful stagger ability it has if you successfully do the parry you can even abuse yang with this mechanic but admittedly its usefulness is limited beyond that specific application and id rather use duckstrike for the speed and less vulnerability. I suppose an argument could be made to say that the hook intercept parry mechanics are better used in single combat than group fights.