My first Crota Hardmode kill was with a Dragonbreath hit that helped take him down (see the video). I think it is a very good rocket launcher. Of course you are going to miss some hits (it is in the video as wel) but the blast radius is fantastic to clear thralls on the stairs. I havent been blessed by the RNG God to get a Ghorn, it is the only exotic heavy weapon that I do not have. I have to deal with I have. :)