Magery also has its own skill set to make the spells you cast more powerful, more efficient, and less expensive. Some of these skills must be learned anew for each school of magic desired, and have differing costs based on the school you are training.

Archmage
-Cost: 500g
-Requires:
Description: Increases the effect of most spells from all schools of magic

Veteran Magery
-Cost: 500g
-Requires:
Description: Reduces the stamina cost of spells

Mana Conservation
-Cost: 250g
-Requires:
Description: Reduces the mana needed to cast spells

Esoteric
-Cost: 250g
-Requires:
Description: Grants a small bonus to maximum mana

Durable Spells (available for each school of magic)
-Cost
-oLesser Magic: 50g
-oGreater Magic: 200g
-oAll other Schools: 250g
-Requires: skill level 25+
Description: Increases the duration of spells from that school of magic

Intensify (available for each school of magic)
-Cost
-oLesser Magic: 200g
-oGreater Magic: 800g
-oAll other Schools: 1000g
-Requires: skill level 100
Description: Increase the magnitude of spells in that school of magic



I got part of this guide from mmogoldservice DOT com.

if you need more details,you can go there.