There is one fatal flaw to be wary of. MAG % meters will not save odd numbers. If you quit a game (or leave a team while online) or store the MAG in the bank any odd numbers will be rounded down to the next even number. For example: the POW % meter is at 75% and you quit the game. When you return later it will have been rounded down to 74%. To test this out feed a level 5 baby MAG 3 Star Atoms (Star Atoms add 25% to each stat meter on a baby MAG) and then quit the game. Make another game and feed it another Star Atom and instead of hitting the 100% mark and adding levels it will stop at 99%. I've never understood why this happens, but it does happen. So do be advised about this issue.

Note:
The Power and Mind MAGs are extremely fragile. You have to follow the feeding regimen exactly. One mis-feed will literally mess them up and not allow them to have the optimum stats. So make sure you keep track of how many items you've fed your MAG. Also, make sure to feed them in the order given. On the Mind MAG it'll say to give the Level 10 to 35, feed 76 Trifluids, 5 Antiparalysis, 1 Difluid. You must feed all 76 Trifluids, then the 5 Antiparalysis, then finally the lone Difluid. Messing up the feeding orders will mess up the MAG's levels.

Level 5 to 10, feed 13 Monomates
DEF +0.65, total 5.65
POW +5.20, total 5.20
DEX +0.65, total 0.65

Note:
MAG must be fed by a ranger to level 10. PB earned will be Estlla.
Foods:
Monomate gives DEF +0.05, POW +0.40, DEX +0.05.

Level 10 to 35, feed 105 Dimates, 1 Antidote
DEF +6.3, total 11.95
POW +15.80, total 21.00
DEX +3.3, total 3.95

Note:
MAG can be fed by any class to level 35. PB earned will be Golla regardless of the class type.
Foods:
Dimate gives DEF +0.06, POW +0.15, DEX +0.03; Antidote gives POW +0.05, DEX +0.15.

Level 35 to 50, feed 500 Monomates
DEF +0.00, total 11.95
POW +15.00, total 36.00
DEX +0.00, total 3.95

Note:
MAG can be fed by any class to level 50. PB earned will be Golla for an A-hunter, Pilla for a B-hunter, Pilla for an A-ranger, Mylla & Youlla for a B-ranger, Golla for an A-force, or Pilla for a B-force.
Foods:
Monomate gives POW +0.03.

Level 50+, feed Monomates or Dimates until MAG reaches level 200.
Note:
Class and ID doesn't matter, but feeding speed will vary.

Level 5 to 10, feed 13 Monofluids
DEF +0.65, total 5.65
DEX +0.65, total 0.65
MIND +5.20, total 5.20

Note:
MAG must be fed by a ranger to level 10. PB earned will be Estlla.
Foods:
Monofluid gives DEF +0.05, DEX +0.05, MIND +0.40.

Level 10 to 35, feed 76 Trifluids, 5 Antiparalysis, 1 Difluid (in that exact order)
DEF +5.34, total 10.99
DEX +5.29, total 5.94
MIND +14.82, total 20.02

Note:
MAG can be fed by any class to level 35. PBs earned will be Mylla & Youlla regardless of the class type.
Foods:
Trifluid gives DEF +0.07, DEX +0.06, MIND +0.19; Antiparalysis gives DEF -0.01, DEX +0.14, MIND +0.05; Difluid gives DEF +0.07, DEX +0.03, MIND +0.13.

Level 35 to 50, feed 375 Monofluids
DEF +0.00, total 10.99
DEX +0.00, total 5.94
MIND +15.00, total 35.02

Note:
MAG can be fed by any class to level 50. PB earned will be Golla for an A-hunter, Estlla for a B-hunter, Estlla for an A-ranger, Estlla for a B-ranger, Mylla & Youlla for an A-force, or Mylla & Youlla for a B-force.
Foods: Monofluid gives MIND +0.04.

Level 50+, feed Monofluids or Difluids until MAG reaches level 200.
Note: class and ID doesn't matter, but feeding speed will vary.

How to make a maximum DEX MAG using a basic MAG
Final outcome: DEF 5, POW 6, DEX 189, MIND 0

Level 5 to 10, feed 4 Antidotes and 9 Antiparalysis
DEF +0.65, total 5.65
POW +0.40, total 0.40
DEX +5.20, total 5.20
MIND +0.90, total 0.90

Note:
MAG must be fed by a ranger to level 10. PB earned will be Estlla.
Foods:
Antidote gives DEF +0.05, POW +0.10, DEX +0.40; Antiparalysis gives DEF +0.05, DEX +0.40, MIND +0.10.

Level 10 to 35, feed 126 Antidotes
DEF +0.00, total 5.65
POW +6.30, total 6.70
DEX +18.90, total 24.10
MIND +0.00, total 0.90

Note:
MAG can be fed by any class to level 35. PB earned will be Pilla regardless of class type.
Foods:
Antidote gives POW +0.05, DEX +0.15.

Level 35 to 50, feed 75 Antiparalysis
DEF -0.64, total 5.01
POW -0.70, total 6.00
DEX +15.00, total 39.10
MIND -0.90, total 0.00

Note:
MAG can be fed by any class to level 50. PB earned will be Mylla & Youlla for an A-hunter, Pilla for a B-hunter, Pilla for an A-ranger, Mylla & Youlla for a B-ranger, Farlla for an A-force, or Pilla for a B-force.
Foods:
Antiparalysis gives DEF -0.04, POW -0.05, DEX +0.20, MIND -0.05.

Level 50+, feed as noted below until MAG reaches level 200

For MAGs Apsaras, Bhirava, Kaitabha, Kama, Kumara, Ushasu, and Varaha feed Antidotes.
For MAGs Durga, Ila, Garuda, Nandin, Ribhava, Sita, Soma, and Yaksa feed Antiparalysis.
For MAGs Andhaka, Bana, Kabanda, Madu, Marica, Naga, Naraka, and Ravana it is recommended to give the MAG to another character that will get a different MAG type (as above), otherwise alternate between Antidotes and Antiparalysis.