Array magic also had similarities with Incantation.
Incantation requires one to circulate their mana as it follows the pathway formed by the caster's words of power.
It will then form a magic circle which will influence the surrounding mana.
The said influence would help with lessening the mana expenditure of the caster and help with the enhancement of the magic spell's power.
Meanwhile, array magic requires the caster to first form the magic circle through various means.
Said means could be writing on a paper with mana-filled ink, or just inscribing a magic circle using a material that would act as a mana conductor.
Of course, drawing a magic circle was not as simple as simply drawing a circle.