I was hand waving things before but put some thought into the matrix so here are the basics for your consideration
Matrix Node guidelines
Geomancy is the practice of manipulation of patterns, often called arrays
Arrays can be 1D, 2D, 3D, or 4D. (dimension)
Ex: A scroll is essentially a 1D array. A linear arrangement of symbols/words that manipulates magic
Ex: A spell is 4D as it involves movements in all 4
A basic Node array is 2D
Ex: Barrier creates a wall of protection, Conceal hides from some sense, Extend increases the range of the next magic cast from the Node, etc...
Advanced functions of Nodes are 3D, multiple 2D in a row, with most being 2 or 3 arrangements.
Ex : Teleport = connect, address, Move / Communicate = connect, address, talk / etc
Simply by adding the Scramble pattern at the beginning of any array you will wipe the current pattern
Ideas for basic arrays:
1D : Focus, Amplify, Resist, Dissipate
2D : Block, Hide, Project, Sense, Gather, Diffuse, Move, Connect, Chaos/Change, Stasis/Bind
3D : Teleport, Scry, Communicate, ...
The major advantage of the Matrix and it's Nodes is that they are a Matrix. Each Node contributes to the overall Matrix. Thus when enacting a effect from 1 Node it can draw on the power of all. However it is a Matrix not a Hierarchy so no 1 Node can use all of the power. However 1/1000 of all the Matrix power, while negligible for the Realm is massive for 1 Node. The Nodes have built in safety features that limit the power output. However when using features between multiple nodes this can be partially bypassed. Ex: teleporting form a Node to a random place has limits on mass and range. From 1 node to another is almost limitless. Limits applied to nodes are tied to the complexity of the array so a 3D array can use more power than a 2 but takes more skill and the node automatically tries to block inept executions of arrays and do nothing but accidents have been known to happen. So practitioners are cautioned when experimenting over 2D patterns.