I'm sure killer won't start. The thing that I believe AJ wants is defensive ability out of that spot. He's getting enough offense from dirk/.. well just dirk.
But marquis is playing the third scorer role with jason so I think he wants marshall to come in and be a defensive guy which he did really well last night.
The offense was an extra bonus.
Also the mavs still have a big problem when dirk goes off the floor..As well as Rawle has done, I can't say the same for Josh. I think he's more of a "power" small forward but when dirk goes off the floor they still need a shooter.