Know the aircraft, know the profile, be able to read a plate (in case your chosen approach is suddenly denied and changed, be able to suddenly calculate a track and execute it when ATC say so, be proficient.
It's a lot less stressfull than your original test - but the limits are the same.
RANT should certainly help you get your head around the tracking, but not really the approach (descent profile).
Flight sim, maybe? Dunno, I don't play it much.
KNOW the aircraft.