I think he meant the most dynamic shooter off the ball. Kawhi is going to need to dominate the ball so much - especially if no Manu - that surrounding him with shooters will be so key.
Murray remains an awkward fit. Can't dribble, can't shoot right now and is messy with passes (could be less skilled guys in SL who can't catch). Size and effort on defense have been good, and rebounding is a plus. But playing him off the ball only works if he can be a slasher. He's not ready to run an offense.
Not sure which lineups you can play Forbes with. He probably faces bench units and is on the floor with Manu and Pau. He'll get eaten alive on the defensive end unless careful.