I agree that a light kite is more relevant to foiling, and not so much to twin tips.
I am only talking about the larger sizes here 10-12 mtr typically the most used for TTips
and this fact has made my next kite purchase more difficult to choose.
I currently use V4 Ozone Reo 3 strut kites, which work very well for both foils and Ttips, but!
the 10 and 12 Reo's are not as light as lets say the Ozone V1 one strut Alpha, and I know through using many other large 1 strut kites that they are poor for many aspects of Ttip riding, most of all boosting! and high wind stability is poor in comparison to multi strut kites.
But for foiling I am thinking the Ozone Alpha will be superb, it should not tumble down to the water as easily, and being very light should be easier to encourage off the water when I drop it for some reason, which of course I will at some time, as we all do.
but It will never be able to replace the Reos for use on the Ttip, and that makes the choice so difficult, owning two 12mtr kites is so expensive to fund.
I need to demo a 12 mtr Alpha, and then make an informed choice.
Years ago there were some very light multi strut kites, made to be very responsive, fast turning, easy to launch, boosting demons, they were superb,
they were fragile, very fragile in the case of the Airush 15mtr pro, which was unbelievably good in every aspect except durability.
later came the North Dyno, great for lightwind and boosting on a Ttip, not as fragile as the Airush but not a nimble either, but good all the same.
just two examples of two lightweight- light wind kites which excelled in many ways better than their heavier cousins.