I'll say with 85 pto hp, you have just enough hp to run that 10 ft disc mower conditioner. I've got 85 hp on mine and its just enough in heavy yields.
You could run a much wider sickle bar mower condition like a 14 ft centre pull pivot type, but you'd have a sickle type rig. If your ground is smooth, not rocks etc, you could do this easily and save a lot of fuel. My ground isn't like that, I won't go back to sickle bar type if I can help it.