Ive never understood the "need gally to join" shit i can do all the raids and PoE without using one if you cant then you shouldn't be playing the game because you are trash. Two rockets of any kind from 4 players can down crota. Atheon you should use a sniper it hits harder and keeps him in place for better follow up shots. And well PoE you just hid in one place and shoot the boss till he dies a Ghorn is only to help speed the kill thats all nothing else.