Best way as a rogue to deal with a boxer and contribute to his team is to just sap the hell out of the boxer. Not only will it really piss off a boxer, it will also prevent a boxer from taking action as a boxer ain't very keen on a separated team. The best thing to contribute to your team is just leave the toon behind, a not so smart rogue will go open on the toon. A smart one will move with your team and sap the next one.