I think I do it just like the Germans did, against all the bombers. Run parallel and slightly above them (hold at about 2k distance), until you get about 2500-3000 yards in front. At that point, you've got 2 options. You either turn in for the head-on, typically not a direct headon because that'll get you killed.. but it is basically a headon. Or, what I do is climb until I am almost directly overhead (slightly in front is good), then dive straight down on one bomber... make your pass, pull through going in the same direction as the bombers, use your speed to set up for another run.
B26s are harder to kill than B17s, mostly because it takes longer to set up for a good attack on them.