I usually gear VIT for Jump, then acc/att for High Jump. I can't confirm that it's the best but I think that's the right idea.
Genbucket, Fort. Torque, Mercenary's Ring, Osode, Warwolf, Bibiki Seashell, Rutter Sabatons, then acc/atk gear for jump.
For high jump, I kinda just toss in whatever acc/atk I can, while retaining my 5-hit STP pieces anyway.
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