well, the best advice with going for a drone.....most tend to go for the right drone, as they approach from the rear of the bomber formation. they do this to avoid the "warp" as the left drone is destroyed, and the rightr drone moves over. i(and i think a lot of us) guin from this drone for this reason. if you're gonna go for a drone, then go for the left one first, keep speed high, and keep "slashing", as you're a much harder target this way.
this is what happens on a six high attack....
and if i recall, this one was a direct six attack......
generally, fly parallel to the target, about 3k above them, and about 1.5k to 2k horizontal from them(to keep out of their gun range). continue till they're about 45 degrees behind you(about your 4 or 5 oclock). turn into their flight path, adjust as necessary, try to keep your speed above 400mph. take your shot, and keep going. bank slightly in the direction of your original heading, so as you climb back up above them, you're pulling out front again. repeat and rinse.
if you misjudge the turn, and they're passing through before you can get guns on them, use your rudder to "skid" the plane slightly,. if you get guns on him, take a shot, and then see above.
this is the slow way to do it, but it works about 80% of the time, and is much easier than the vertical dive. it also gives you a chance to put rounds in all three of the planes in the formation if you do it right.
these types of slashing attacks work best for me, and on the other end, i've found these to be the absolute hardest to defend against.