Also, call me old-fashioned but if you're going to diss someone you can't just take generic shots at them. You have to dismantle their style, their character and the way they present themselves in a manner that makes them look ridiculous. This has to be done in a powerful, memorable way that sticks in the mind of the listener.
AKA's line about L-Tido being 'Maggz's handbag' does this well. I'm not sure if I've heard any other lines that do this though. Can anyone else think of any?
I think the problem with these guys is that their styles are just too similar so none of their disses make sense (like them accusing each other of sounding American).