A weapon that can combat directly to the RoBF. Such as a exbow, axbow, and MsK do. Hits the wearer first then goes from there. So many RoBF teams atm are set up where you have to take it out one at a time till you get to its wearer.
RoBF really has no other offense to it. It has perfect damage only weakened by AC, evasion, and AMF on it. It would be a solid offense that makes them actually train something and not just have a big team of walls that gets pounded on.