I have not done weekly heroics in awhile unless asked. But I still get them in the harder nightfalls and of course from POE chests. So mine are from that and if I decide to buy a third ghorn(other two from Crota missions)that is my concern. I have 212 coins, have to spend it on something. Also, when Hawkmoon finally makes it to Xur, I will not need it due to getting more than 3 of them, but a few friends never seem to get it and they love hand cannons. So it's RNG of this game's fault for Xur, not the players.