Stacking Assault Stance
Originally Posted by stack
Discipline: Sandbox Goliath (Stance)
Prerequisite(s): One Sandbox Goliath maneuver
Initiation Action: 1 swift action
The Sandbox Goliath discipline draws its inspiration from many techniques, and many students have left their mark on the school. One such student taught that victory came from teamwork, which he proceeded to define as "a bunch of dudes ganging up on another dude." His trademark stance involved fluid movement and a total lack of respect for personal space, which he learned after studying with the Ratfolk in their communal living and combat techniques.
While in this stance, the martial disciple gains the benefit of the Ratfolk Swarming racial trait. He may occupy the same space as any one character with that trait as if he had it. Alternatively, up to three characters using this stance may occupy the same space. If two or more characters occupying the same space attack the same enemy, they are treated as flanking.
I pretty much just based this on Stack's name. As in, how can I make melee combatants stack? Answer: Put them all in one space.
For level purposes, I used Golden Lion Commander stance as a template, which allows any ally within 30 feet to flank. Instead of any ally within 30 feet, it's within the same space, but you get to share a space. So, that's a thing.