If the O-1 is smart (and listens to the advice of their superior officers), they’ll listen carefully to the W-4 or E-5 and mostly parrot their words and follow their recommendations. And the subordinate should do a lot of very polite teaching in the process, so the O-1 comes to understand the whys and wherefores of that Warrant’s or NCO’s guidance so they can make those decisions by themselves later.
I think I got my skill at professional teaching bringing up some very wet-behind-the-ears 2nd Lieutenants.