Legendary Effect Changes document thing:

Requirements: Fallout 4, preferably up to date

Possible conflicts:
- Anything that alters the vanilla legendary effects
- Things that alter the poison and incendiary damage type

I personally put this near the bottom of my load order, but I'm not really smart so idk

Legendaries changed:
Assassins, exterminators, ghoul slayers, hunters, mutant slayers, troubleshooters all do +100% damage
Crippling - 150% more limb damage
Incendiary - increase damage to 10/s for 3 seconds, stacks
Penetrating - ignore 50% of damage resistance
Poisoners: 15 dmg/s for 4 seconds, stacks
Powerful - 60% damage
Quickdraw - 40% fewer action points
Rapid - 100% faster firerate, +50% faster reload
Staggering - has four conditions:
- semi ranged - rng <= 30, changed to 45 [I wanted more oomp behind those shotgun shots]
- auto ranged - rng <= 5, changed to 10 [I know it's automatic but even then, 5% feels really low to me]
- melee 1h - rng <= 50, changed to 70 [I think this makes melee fun but still makes it so its not totally flawless] 
- melee 2h - rng <= 50, changed to 70
Violent - 40% for both bonuses
Vats enhanced (ranged): 60% accuracy boost, 10% AP reduction
Junkies: 25% damage boost per addiction, allowing a total of +325% when having 13 addictions

Altered files:
- Object effects of Fire and Poison damage, as well as LegendaryChanceToStagger
- The object files of the altered legendaries
- the perk entry of ModLegendaryCommonPerk