Proper bedding is a must. If not, you are risking losing money or wasting time at track.
In my personal experience I did rotor and pads both together. My choice was a less expensive rotor, around 35$ each. At that cost it is a no brainer doing pads and rotor at the same time.
Again was on what is working for me. Braking hard on track. No babysitting the car.
Hope it helps, you can see my post about that.
https://www.ft86club.com/forums/show...&postcount=374