Good question.
Here would be my idea as I put on my coaching hat.
You need a wing player who can defend Lebron really well.
(see Tony Allen.)
Lebron is VERY good, but he's NOT unguardable. Like any other player, if you defend him well enough, he will crumble.
There was a time where Paul defended Lebron really well but Paul has gotten older and Lebron has gotten better.
Honestly, this is where we'll need Jeff Green the most!
Fortunately, Green defended Lebron REALLY well on that Sunday afternoon game in January.
If he can continue to do that, then bring on Miami
OH, also not just Lebron, but be leery of Chris Bosh.
In the last two playoff series, Bosh has been a thorn on our side.
KG needs to do a better job defending and posting out Bosh.