Here's how I would acquire the players:
Chandler - I would try to replicate the trade that was made that fell through. I would sign and trade Wilcox along with an expiring contract; I would throw in a draft pick as well.
Odom - Again, he is a free agent and the rumors around say he wants to leave LA. I would send Harrington's expiring contract along with another roster player, like Jeffries for him. Jeffries would be great in LA, they need a perimeter player/defender that won't steal time away from Kobe. Harrington brings allot of what Odom had but no as good a defender but better offensive player. Would add a pick if that got the deal done.
Johnson- Send Hughes expiring contract along with a sign and trade of David Lee. The Hawkes need a rebounder who can keep pace. I feel they are ready to part ways with Johnson and his contract is up after next season so Hughes contract doesn't add, it stays in line with Johnson's and Lee brings fron court help that they need. I think this move would help to put Atlanta over the edge!!