IMPs
Decide on which leads you would prefer to declare and on which leads you'd prefer to defend (double dummy either way). Yes I know technically if you're playing double dummy you get to choose your lead but that ruins half the variations.
Edit: I think the club lead variations are in general the most interesting, but probably the most fun line is on a low diamond lead to the K, ducked (best), and the Q of hearts back (best IMO)