I have 1 of each character class. All 32s. Every week I do the nightfall x3, atheon/gorgons x6 (normal/hard), crota/deathsinger x6. That's 27 shots at exotics along with roc strikes and occasionally some crucible. On top of that I've watched (at last count) THIRTY-FIVE of them drop for other people in the last month. It's a troll launcher xD