As for the character itself you can go with a fairly standard setup with 50 FCR that allows a good chunk of MF:
'Beast' non-ethereal
'Enigma'
Harlequin Crest 'Perfect Topaz'
Homunculus 'Perfect Topaz' or 'Um'
Mara's
Trang-Oul's gloves or Magefist
Arachnid Mesh
War Traveler
SoJ/BKWB
Rare/Crafted FCR ring
I'd switch out homunculus for boneflame (1 more skill). And if you got a good craft you could switch mara's for a crafted amu and FCR with another soj/bkwb. That's another extra +skill while keeping the same cast rate.