Speed is pretty unimportant for Baze. He gets passive tm gain and counterattacks.
As for whether health or protection is better, it depends. Generally protection is better than health. However, when healing comes into play it becomes a bit murky, especially if they are getting auto % based heals like Chirrut or Barriss gives out. If you are also using a zeta Jyn lead with him, then Protection all the way for sure.
The safe bet is just to stack protection. Health might be better, but you'd have to try it both ways to see for sure as it depends on your team comp and where you're using him.
