The other thing to note is that the Commander has access to all the Tau warlord traits, unlike the Ethereal.
Having said that, Hit and Run can be good in some allied builds - Hit and Run assault terminators, or maybe even Hit and Run Seer Council for example.
Need something to provide volume of fire (again unlikely in a Tau Cadre!) – 2 Burst Cannons a Drone Controller and 2 Gun Drones. Twelve S5 BS5 shots