If you want something easy and aren't too particular on what PB's you get (and don't mind using a Viridia, Skyly, Purplenum, Redria or Yellowboze Hunter) you can follow the feeding plan below to get a Mag with the stats:
DEF = 30
POW = 0
DEX = 20
MIND = 50
PBs: Golla, Farla, Mylla
Feed 3 Moon Atomizer to your: mag ( 5) 5/0/0/0
Feed 7 Difluid to your: mag ( 5) 5/0/0/0
Feed 88 Moon Atomizer to your: Varuna ( 10) 6/0/0/4
Feed 228 Antiparalysis to your: vayu ( 35) 14/0/8/13
Feed 177 Moon Atomizer to your: ushasu ( 51) 30/0/8/13
Feed 17 Antidote to your: ushasu ( 97) 30/0/17/50
Cost: 152140 meseta. Time: approx 8.65 hours
Remember to give the Mag to a Female FO with a Section ID of Viridia, Blueful, Redria or Whitill just before it turns level 100. After it evolves to a Sato it will be easy to Raise only Mind so you end up with
30 Def
0 Pow
20 Dex
150 Mind
Hope that helps
I worked out an alternate feeding guide for Hunters with a section ID of Greenill, Bluefull, Pinkal, Oran or Whitill and will have the following stats:
DEF = 30
POW = 0
DEX = 20
MIND = 50
PBs: Estlla, Farla, Mylla
Feed 3 Moon Atomizer to your: mag ( 5) 5/0/0/0
Feed 7 Difluid to your: mag ( 5) 5/0/0/0
Feed 88 Moon Atomizer to your: Varuna ( 10) 6/0/0/4
Feed 214 Antiparalysis to your: vayu ( 35) 14/0/8/13
Feed 19 Antidote to your: soma ( 50) 29/0/8/13
Feed 177 Moon Atomizer to your: soma ( 52) 30/0/9/13
Feed 11 Antiparalysis to your: soma ( 98 ) 30/0/18/50
Cost: 152080 meseta. Time: approx 8.63 hours