Actually I've found out that about 30-50 points works just as well, if not better. and you want to have about 1-4 points of slowfall in an item...
but several jumps with about a 30 points of jump will take you just as far, and of course you can squeeze in about 15 points of jump as constant effect in an exquisite ring.
I used to claim, when I discovered superjumping a long time ago, that the best use was to boost the jump spell up to about 400, and jump from balmora to ghostgate, but since then I have discovered that a much smaller increment is far more enjoyable and useful...about a jump of 40 is perfect for me, since it only takes about 3-5 jumps to get from balmora to alhrune, and when I jump in combat I don't end up in the next township...
making a pair of shoes with about 2 points of slowfall and a constant effect walk on water allows you to jump from tel branora to tel fyr...jumping is a lot more fun with a small jump enhance, in a non-annoying constant effect item, and making smaller jumps...allows you to enjoy the scenery more, and its far more useful in combat...
They call me Darth...
Darth Gizka!
Muwahahahahhahahha!!!