Big depowerable foils will have immense hangtime, yes.
But I also find and think that medium aspect "allround" SLE kites are performing best regarding jumping
Some C kites can also jump extremely high - because they have a very efficient turn and redirect, so higher acceleration/shorter ascent, leading to smaller "loss" - thus really high jumps
But more difficult, and it requires more steady wind conditions.
With an allround SLE it will be way easier to make consistent high jumps
Although, IMO, never higher than with a C kite when everything matches.
You get a considerable amount less hangtime with the C, true - but maybe the highest jumps.
Low aspect SLE kites are IMO not good for jumping high, but will have "float" (hangtime) if a deep profile and delta, as they have too much vortex loss when ascending, compared to a bit higher AR kite.
Really high AR SLE kites will be a bit too slow for giving the best "kick" and not as efficient redirect - so there is a limit - and I think that medium or even a bit above medium AR (not low AR) kites jump the highest
Above is only valid for quite big kites (10-14m2 f.ex), and not the small ones, where you could go higher in AR if you wanted, because turning/redirecting is no longer the same issue.
But because the small kites have so little loss as they are not "forced" into a turn the same way - we usually want the smaller ones to be lower AR, so we get a more stable and less "over"sensitive kite.
So for max jump height ANY not too low nor too high AR kite will work IMO.
For max hangtime - depowerable foils and depowerable bow kites outperform everything else by a huge margin - but jump height can be a problem if large kites.
So the "moderate" AR SLE kite with some camber but not too much, has a bit of everything - a quite effective turn and relatively fast ascent, and one is still able to hold and control quite a large size in more wind - giving even more hangtime
Just my take on the best jumping kite for both height and hangtime