I think the best line is to ruff at trick 1 and lead ♣J from dummy. This maximizes the chance that RHO will win (cover or Ace) the club trick, preparing you for the double squeeze. Since the ♦K was led, RHO may well hold ♥K here. Best if you can do this quickly too. Now, if small ♦ was led, the heart finesse should nearly always win, and therefore should be taken to guard against 3-0 trumps.