I mean what deck are you running them in? I run 4x roast in my red devo sideboard, but that's because I don't really fear anything white or blue, maybe Brimaz but he sees no play in my area. It's all about what cards give you bad match ups. If you already crush siege rhinos and coursers, but {dragonlord ojutai} is kicking your butt, sure run volley. Or, both...