Assuming you have access to a very large sum of gil, this is what I would reccomend.
Head: Voyager Sallet (41), AF (56), Feral Mask (70), Optical Hat (70).
Neck: Spike Necklace (21), Peacock Charm (33), Spectacles (59), If you can't afford spectacles or a peacock charm, switch to Grand Temple Knight's Collar at 65.
Ear: Beetle Earring +1 (21), Tortoise Earring +1 (40), Spike Earring (55), Coral Earring (63). (if you can find any on the AH, Accurate Earrings beat out all of the aforementioned.)
Body: Jujitsu Gi (40), Master's Gi (55), Scorpion Harness (57). The scorpion harness is worth every gil, I myself am working on getting one.
Back: Cavaliers Mantle +1 (37), Royal Army Mantle (55), Amemit Mantle (61).
Hands: Ochiudo's Kote (34). Kote is definitely the best thing until 52. But at 52 Enkelados's Bracelets will get you a little more damage. But I would advise hanging onto the Kote until 60 (when you should buy Pallas's Bracelets); since attack is the secret to doing damage against crabs.
Finger: Sniper's Rings (40), if you have a bard in your party, switch to the current strength rings for your level.
Waist: Brown Belt (40), Life Belt (48) (if you have a bard in your party, switch to brown belt), Black Belt (71).
Legs: Jujitsu Sitabaki (37), Master's Sitabaki +1 (53), Rasetsu Hakama (72)
Feet: Fuma Khayan (39), Fuma Sune-Ate (73). I sold my Fuma's when I got my AF, and I regret it immensely.
I left out all the Abjuration Gear from the list. Hope this helps.