You have to understand that "doubles" as you call them appear in two entirely different rhythmical scenarios.
a.) 1/6 doubles:
These are the doubles as they appear In Dragons and all other kinds of swingy 1/3 songs. Here you have to realize that the second circle always ends on a red or white line, which represent the mostly dominant beats in the music. So you focus your clicking on the main beats, but add an additional click right before it. To get a feeling I recommend to use the secondary finger for the first circle and the primary for the second, dominant circle. (this isn't necessary, especially if you spend some time practicing your finger coordination so you can use both fingers for whatever)
b.) 1/4 doubles:
These doubles are a little bit harder to explain. They're a common melodical phenomenon. As you see, they land on the second red tick and the following blue tick of a measure, then the next double starts at the next blue tick and ends on the next red tick. This way, the strong WHITE tick carrying the backbeat of the track is SKIPPED entirely by the melody. that's why they're somewhat weird to understand while playing.
also every consecutive double switches the focus between first and second circle, as the first double has the focus on the first circle, and the second double has it on the second circle, so you have to keep that in mind when playing. No real >tips< here, try to understand what you're doing and try switching your fingers according to the dominant circles, aside from that it's just practice.