I think you're underrating the importance of Odom; he averaged 32 minutes per game in the playoffs. If he's gone from the Lakers, it will be a fairly significant loss.
(Ariza averaged 31.4 minutes. Artest alone wouldn't make up for the loss of both.)
Perhaps it was the way that I phrased it, but I what I was trying to say was that this thread made me realize that even if the Lakers retain Odom their bench is not incredibly impressive. I am in complete agreement with you about the importance of Odom, and I also agree that Artest can't make up for both his and Ariza's loss.
What I attempted to express, albeit poorly I guess, was that I just hadn't thought about the Lakers bench before, and now when you look at it, there is a short list of players they can depend on. Farmar, Vujacic, (maybe) Brown. But who else? Who else will come in and take the stress of their starters? As I said before, especially in playoff time when the benches are shortened and you go to your solid guys, the Lakers might start to find problems when they turn to their bench without Odom (and possibly with him.)
Basically, I agree with you Roy, it would be a significant loss. And I believe that even with him, they might have bench problems. I just didn't say it clearly.