oooo now that one I may know something about. The Dora can outrun, outroll and outclimb the 51, so the ponys bread and butter is in the turn fight and flaps. Stay away from the headon passes as much as possible keeping the 190 close (if he allows you) , while creating angles so that he'll want to start turning. If he won't go for the turn fight pretend he has you beat and start running away. He'll think "hahaha, I got him now..I'm faster" all ponys do is run away right? Get the fight fast, when he gets within 600 or so dump a notch of flaps and pull hard to on side while watching him, when he follows start the scissors and wait for him to fly in front of your guns.
The Doras best chance at a kill is to just BnZ the pony til he's out of E or bait him into a rope. This fight is the 190s to lose though, as I think it's a better plane if used to it's strenghts. It's when he starts letting the 51 dictate the fight is when he gets into trouble.
how about a 109K4 vs C205