Parson's mathamancy gauntlet is aligned with the Numbers axis.
Not much is known about Numbers, except that:
Foolamancy may be used to 'veil' units, cities, etc.
Mathamancy may be used to calculate odds.
Moneymancy is involved in unit production for natural allies.
May have more to do with upkeep and 'passive' uses. Moneymancy to create units and so on, rather than actually be offensive. Foolamancy was used to shroud Stanley the Tool, and to hide the cities in Faq from prying eyes.
Numbers Magic appears to be tied up in altering probabilities in a situation. Veiling in Foolamancy works towards a single probable outcome (deception). Mathamancy can calculate (but not affect) the odds for all possible outcomes. Use of Moneymancy alters the odds in a conflict between sides by shifting the balance of power beforehand (but not during). Numbers Magics work indirectly towards a specific resolution, as opposed to the more linearly acting Fate and Erf Magics.