The Formation suite of spells are multicast modifiers that cause spells to be fired at specific angles, thus creating a predictable spread effect as opposed to the variable scatter multicasts.
The Formation suite of spells are actually simple multicasts with a Formation modifier. Each projectile in the evaluation will be distributed to its angle. For example, a Pentagon Formation with a Double Spell is equal to a Hexagon Formation.
The Bifurcated formation forces a 45-degree spread. The Trifurcated formation forces a 20-degree spread between each of the 3 casts.
Can be used to create patterns maximizing the area of arcing modifiers such as Electric Arc or a splash explosion-like effect when used with a Trigger.
The order of the spells in the wand matters, and will be used in a clockwise manner. For example, with the 'Above and Below' variant, the first spell after the modifier fires upwards, then forward, then down (if pointing to the right).
Spells that normally fire multiple projectiles, like Triplicate Bolt, can use multiple firing angles at once if an insufficient amount of other projectile spells are included with the multicast.