One of the main keys to this series, IMO, would be making Curry work on D.
PnR them to death until you get the right switch and make Curry guard LeBron. Either he gives up buckets, or he overworks himself on D which will hurt his offense.
If they don't switch, wait for the little daylight you get from Curry trying to run over screens to attack. Also, him running around screens will also exhaust him.
If he's guarding JR, make JR run around the whole arena, getting multiple screens.
Just fuck with Curry on D. He is the weakest link and it will either open up shots or exhaust him.
(obviously more keys to the game, but I think this point gets ignored usually)