For some reason, the A5 seems to be most succesful at this (I guess it would be due to increased manuverabilty alowing them to get guns to bear on a target easier).
Slashing attacks work just fine.
Like the 109; the 190 (especially at low alt) is well suited to attacking from a relative vertical plain; regardless of whether its position is above or below a target. In such a situation; I think you will find that most actually prefer to attack from below as the over-nose visibility problem is less of a factor and the zoom ability is above average; allowing one, in the event of an unsuccessful pass, to quickly wing over for another pass from above; all while the target thinks you will continue to "extend" like a more typical 190 driver.
This brings us to the next point.
I cant speak much to the Dora or 152; but the A5's primary attribute, so far as I have witnessed, is that very few cartoon pilets expect any 190 to press an attack.
Within 540 degrees; the A5 can turn surprisingly well and its engine is well suited to the MA; peak performance being made from the deck to about 4,500ft, IIRC. Granted it's not a late-war uber-bird but its easy to see how it dominated the comparable Allied A/C of the day.
Change of direction is superb thanks to the vomit-inducing rate of roll. Once you learn how to use that advantage, it can help mitigate the risk of engaging a plane with better sustained turn and/or low-speed performance.
Leave the MG/FF's at home. Ignoring the small magazine and the poor ballistics, the advantages of losing all that outboard weight far eclipse the reduced lethality.
Keep some E handy, the aggression high, the SA at peak and the A5 will surprise.