Gil in the best shape? Is it fact or fiction that his production tails off as the game goes on. Yeah he plays a lot of minutes, but more out of necessity not because he doesn't suffer at all from those minutes. And if you ask me, he's not very fast either. About as quick as Andre Miller and that's it.
Where talking about Body fat, Melo has it and Arenas doesn't. I disagree with using Body fat as the sole means to judge fitness, but it is undeniable that Melo has a fair amount.