The problem in dealing with Jones is you're dealing with continuous action. Jones is a hard guy to feint out or to set up on something.
Only guy who had success (or I should say full success) against Jones at distance was Gus in the first fight. And Gus was smart in using his footwork always angling out of the straight line where Jones is throwing kicks or just shuffling forward using his crisp hands when Jones is trying to box. Gus knew how to disrupt Jones' rhythm.
Johnny is intelligent with his guard and there is a legit threat to Jones fighting inside with Walker, but Johnny didn't show much lateral movement and stuff so I'm still not convinced he'll beat Jones today, maybe tomorrow.
All that said, Johnny Walker by vicious, deadly, nasty KO in the opening minute.