You are banking a lot on the WK like this, too much even I feel. You should get some protection for him.
Final Strike is nice.
Wormtongue can ensure that Durin won't just punch him in the face,
Southron Leader is decent at dealing with multi culture brokennes.
Saruman's Power could be packed also. I don't understand why you run more
Black Steed than
The Pale Blade, feels like
TPB is a superior draw every single time (given you have the extra twilight).
Not a huge fan of
Morgul Destroyer to be honest. A smart player would always just wound his RB and then you spent 2 twilight and a card slot on a vanilla orc for 1 wound. If you want to run him anyway I'd at least suggest to add
Dark as Darkness, so you can preassure your opponent towards adding threats at least a tiny bit.
Some nazzy rings from reflections probably have place here as well, they cycle very easily, make the WK a bit stronger and enable you to reuse him easily. I'd say a ring is strictly better in a 64 cards deck than the 4th copy of
Evil-Smelling Fens, at the very least.