Orgone is the measure of a person's connection with the cosmos. It is the conduit through which the power of the cosmos flows, focused through a sorcerer's will. There are five base forms of magic, each with their own sub-disciplines, which ultimately lead to hundreds of fields of magic.
Enchantment- the binding of Orgone within animate and inanimate objects for a purpose, ongoing or drawn upon in times of need.
Protection- Orgone can be drawn upon to thwart and reflect the undesired intent of others.
Transfiguration- Using orgone to alter and control the living creature be it plant or reasoning being.
Transmutation- weilding Orgone to change the nature of minerals, fluids, and gases, to bind and divide, to empower and to expel.
Warging- the capacity to comprehend, to see beyond the limits of the senses.
These five disciplines can be combined with each other to create new and unique disciplines (ex: enchanting and transmutation). However, I don't want my mages to be able to pick certain spells from each discipline and combine them, or only picking certain fields in various disciplines at once like a Jack of all Trades. Most mages should spend most of their lives studying one discipline. Rare and talented mages go on to accomplish mastering two disciplines. Truly rare individuals, the 1 percenters, would be the ones to combine two or more schools of magic together to create unique forms of magic.
How can I design my system so that mages are forced to master one discipline at a time before moving on to another?