The method here relies heavily on rounding down the odd stats of a mag using trade feeding. It requires trading the mags after every single feed until it evolves into a Kalki, since block switching does NOT round down for 0 DEF mags (for whatever reason). After it becomes a Kalki, feeding can be done as normal.
The following feeding plan is for a RAmar mag. To make a RAcast or RAcaseal mag, feed Mitra Antiparalysis to gain the desired DEX level and feed Monomates for the rest of the POW as normal. As a tip, get to 16 POW with Monomates before feeding Antiparalysis, as you will lose half a level of POW otherwise, wasting about 20 minutes of feeding.
MAG
Trade feed 23 monomates (4/40/4/0) to:
DEF: 0.92
POW: 9.20
DEX: 0.92
MIND: 0.00
Trade feed 1 antidote (4/10/40/0) to:
DEF: 0.96
POW: 9.30
DEX: 1.32
MIND: 0.00
KALKI
Feed 125 antidode (0/5/15/0) to:
DEF: 0.96
POW: 15.55
DEX: 20.07
MIND: 0.00
MITRA
(using group 2 ranger)
Feed 482 monomate (0/3/0/0) to:
DEF: 0.96
POW: 30.01
DEX: 20.07
MIND: 0.00
MADHU
(using group 1 ranger)
Feed 1 dimate (0/11/0/0) to:
DEF: 0.96
POW: 30.12
DEX: 20.07
MIND: 0.00
KAMA
Dragon scale for TELLUSIS
Feed dimates until 200.