As far as I can recall, Torres commands the bridge exactly once, in the episode with The Rock. That was a unique situation anyway because most of the crew was on shore leave and unavailable.Paris outranked Torres, as established in Displaced. Granted, Torres outranked him after Thirty Days when he was demoted to Ensign. Things get fuzzy when Paris is re-promoted in Unimatrix Zero, technically Torres has seniority in rank, but Paris is still command division.
As an aside, I always thought they should have promoted Kim after Thirty Days. Kim outranking Paris would have changed the dynamic to their relationship. But I can't really complain with the running gag about him being a perennial ensign on a ship full of lieutenants.