From ErfWiki

Canon

Disciplines

Class\Axis	Erf	Fate	Numbers
Clevermancy	Luckamancy	Healomancy	Moneymancy

Proposed Canon

Clevermancy is one of the eight major classes of magic in Erfworld.
It is the major class defined by the absence of all the elements of magic.^Erf-b1-p038a

Note that the table in the comic displays Clevermancy as using Life and Motion, duplicating Eyemancy. It is presumed that this is a simple error in canon.