Any of the fast fighters can avoid AAA by flying fast and low, I just think the Mossie is able to do it for the same reasons: its fast. That and it wont catch fire from a few AAA pings, so you actually end up rtb'ing. Maybe with 1 engine, but at least you make it back.

As far as being a 1 vs 1 dueller, it can fight against many of the MA single seaters, but like all those fights, is dependant on pilot abilities, and advantages at the start of the fight, in speed and/or alt. I have managed to defeat enough of them to be happy with it, but its not "uber", it certainly isnt a superfighter or anything like that, if you run into a well fllown enemy fighter, your going to have your hands full.
Like any of them you fly it to its strengths.
...was also ging to mention that with a more robust damage model, its a better low-med alt buff interceptor. Any bombers 15k or below im more than happy to make a gun pass on, assuming you have some speed to make a decent attack.