Suppose I want to land a kerbal on one of Jool's moons, say Vall, for example. How should I approach Jool to make best use of my fuel, without using aerobraking? What kind of orbit should I shoot for? Low or high, circular or elliptical? Or should I try a direct encounter with the moon instead?
I think that the most efficient way is
aerobraking (thus, the orbit altitude is as close as possible), but my rocket doesn't have the necessary aerodynamics nor heat shields for that. Not sure what the next best thing is.
I have been to Jool and some of its moons a few times, some successful, others not so much, each time approaching them differently, haphazardly, never knowing what the best approach is.
I have researched this a lot, but I only find discussions about the best parking orbit at the origin, and the videos about traveling to Jool usually speed up at the arrival, and I can't quite figure out what's the best approach.