Slash proc damage scales with damage multipliers. As such, headshots, orange and red critical hits, or weakspots generated by Sonar or Detect Vulnerability will greatly increase the damage dealt.
Slash is affected by status duration mods. Using Hunter Track in tandem with Hunter Munitions will increase the base 6 second duration to 7 seconds, allowing for 8 ticks of damage rather than the normal 7 ticks.
The 30% trigger chance is independant to itself and is not affected by the weapon's status chance, or damage type distribution, besides being indirectly affected by its critical hit chance.
If a critical hit procs the mod's Slash, any other status proc(s) from the weapon can still occur nomally in addition to it.
However, only one instance of Slash can occur if both the mod and the weapon procs it. One will override the other, despite Slash being a stackable status effect.
It is possible to apply up to three unique status effects per pellet with Hunter Munitions. This can occur if the weapon has an innately forced status effect proc such as Impact, and Hunter Munitions procs Slash, in addition to a status effect proc from the weapon's status chance.