At this point, could we afford to amnesty any of them? It won't be Kobe. Maybe Blake or MWP but who would we get to replace them?
Plus, even if we amnesty MWP we still wouldn't be able to do anything in free agency. I think its best to just hope he plays well and maybe use his expiring contract to pick someone up at the deadline.
It will be Metta. The entire city of LA will personally assassinate Jimbaco on his front yard if they even hint at amnestying Kobe and Blake makes less than Metta making it a waste to use on him. You don't use it on Pau because he is the only big you have left. Metta is the odd man out.