Forgot the lock washer, my bad. Holder for fastening nut is definitely optional.
You should replace the ball joints while the control arms are off. I bought new Upper control arms, but that isn't absolutely necessary. What kind of spring compressor are you using? I recommend using the Klann, those front springs are loooong.
I'm removing and resealing the steering box. Will replace couplers
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Oh yeah, other tips from the manual:
Make sure the orientation of control arm bolts is correct. The head of the bolts on both arms should face each other. In other words, the nuts on the front bushing are on the leading edge and the nuts on the rear bushing are to the rear.
Also, torque LCA bolts with the weight of the car on the wheels, same for top nut of shock absorber. But the bracket bolts of shock absorber should be tightened with the weight off.