4 for each of the end game sets, and a 5th for “other” (mainly LoN would be my guess). I think a great way to get around this would be if they had leaderboards for each class, but also each of the major sets within the class. You wouldn’t be in the top overall crusaders, but where do you rank amongst Roland crusaders? Really hard to tell. if you clear a, whatever, 95 with Roland’s, that’s probably not enough to get you on the overall leaderboard, but more importantly your sense of your mastery of that build isn’t at all clear. This also creates a lot of confusion I think for people using ever so slightly non optimal builds. Because they just look at the leaderboard and copy what’s best. So you get things like, for Crusader, invoker is stronger than ever, Roland’s is stronger than ever, blessed shield is better than ever, HF is stronger than ever.

it seems that in spite of significant rebalancing, when you look at the leaderboards, everyone basically just mimics the top build regardless of how far out in front of the pack it is.

Diablo 3 leaderboard shortcut