For 99% of us...any lightweight, strong taper, phenolic tipped jump cue is prefectly fine.
The differences between say a Lucasi and an Airshooter are minimal. Not big enough to make a difference. Almost not noticible. At that point, differences in persons feel for a cue are bigger. Technique is more important.
Biggest factor is the phenolic tip. That's most of the importance is right there. I'd say strong taper is next. Whippy= bad. Weight is over rated. I have a jump break which the jump portion (made of cocobolo) makes for a much heavier jump cue than any of the lucasi's, stealths, magic jumpers et al. Most people hate that as lighter-the-better is what they prefer. I find that jumper to offer far better stability and cue ball control (it has leather tip) for most jumps. It just isn't as good or as ergonomic (why the light weight comes in handy) for those 1/2 ball or closer jumps. Then I'll agree that the ligher ones are better. But if you're within a 1/2 ball or less, you're in a bad situation regardless and pocketing a ball will be tough. I can pocket balls with my heavier jump cue far more often than with a light weight phenolic tipped cue (less masse induced and much more feel).
I got that JB before the phenlolic tip craze came onto the scene. I've never worked very hard on jump practice, and with minimal practice and with decent technique, impressive jumps can be made with leather tipped jump cues of the past. I still like both. The phenolic tipped modern jump cues make life so much easier when you need to produce a jump over a really close ball during a match when the pressure is on. You don't have the luxury of taking a few practice jumps first. You have to go from possibly shooting regular shots for hours to all of a sudden having to jack up and execute a jump shot. It's like shooting cold in a way. It helps take a lot off your mind so you can focus on getting a good hit or pocketing, rather than focusing all your energy into just getting up over your obsticle.