Damage Bonus Interactions

There's a lot of confusion about what bonus damage items stack, and this guide should help clear up any confusion and disappointment after finally obtaining expensive/grindy items.

Original guide written by Mikan, and all credits for the exhaustive research go to him.
I've translated and updated with what extra epics I have access to, and any further data people can provide on missing items from this list (with screenshots, please) would be appreciated.

Legend: works with doesn't work Base＝Base Damage (percent) Piercing＝Piercing damage (percent)　 Fixed＝Fixed damage Stacking＝Stacks with other boosts of same category SC Neck＝Stacks with SC Neck and similar effects PT＝Works in a party without needing aggro.Since revolution this is no longer a factor.

3 Main Types
①Damage Supplements　＝ Secondary damage numbers : A
②Damage Increasers　＝ Damage number modified : BCD　
③Stat Increasers＝ Stats increased (visible in stat window) : EF


6 Sub-Categories
A-Damage Supplements
B-Critical Damage Increase
C-Damage Increase
D-Stylish Damage Increase
E-Base Attack Increase
F-Piercing Attack Increase

①Damage Supplements
A　-Damage Supplement　(Base Piercing Fixed Stacking SC Neck )　
※Damage shows up as a seperate number

1-Unrestricted
Alice Title(50％)　※2％ proc chance
Red Bug(10％)　Corrupt Blood Sweeper(10％)　
Ghost Sword Elenore(30％)　Daksha's Symbol(20％)　Awake One's Scribbling(30％)　　
Crushing Fist(Old 150 New200)　※That's +200, not 200%!

2-Type Restrictions
Magic Sealed Racial Hatred % Bonuses (Variable) (NOT Smash!)
Hero of the Bantu(Dragons 10％)
Corrupt Blood Gauntlets(Human 20％)　Grandis' Silver Cross(Undead 50％)　
Dark Spirited Thunder Stone(Undead 10％)　Evil-Spirited Flame Stone(Demon 10％)　
Sirebros Karis (Demon/Undead 20％) Banishing Finger(Demon 30％)　　

3-Special Restriction
Corrupt Blood Revolver(Air/Downed 20％)　Death Wish(Downed 5％)
Hyper Mecha Tau Gauntlets(Counter 40％)　Totem of Gold and Sand(Counter 15％)　
Sahpiro's Justice(Counter 25％)　Nilbas' Bloody Scythe(Counter 8％)　
Crux Fidelis(Light Attacks 20％)　Black Devil's Hand(Back Attacks 20％)　
Sky Image（Jump Attacks 15％)
Rocke the Champion(Counter New 40％/Old 50％)

4-Status Restriction
※Assumed that all "bonus damage while bleeding/burned/etc" are in this category.


4-Special Title
Apostle titles (7％)
※For some reasons the stylish increases stack normally on Ozma and Anton.


②　Damage Increase-Ⅰ
B-Critical Damage Increase (Base Piercing Fixed Stacking SC Neck )　
Infractus(20％)　First Step for Counterattack(10％)　Scarverator(10％)　Chrysalis(10％)
Portable Dardanelle Cannon(20％)　Wolfgand's Will(20％)　
Scythe of Diabolus(20％)　Assassin's Greeting(10％)　Kidney Dagger of Mercy(20％)
Magma Cylinder(10％)　Angry Witch's Red Blouse(10％)　Hathor's Bell(20％)　Death by Musket(40％)　

②　Damage Increase-Ⅱ
C-Damage Increase　(Base Piercing Fixed Stacking SC Neck )　　
1-Close/Melee Attack Strength　　※Projectile/ranged attacks do not apply
Chosen One's Greatsword: Gram(20％)　Evil Sword Aphopis(10％)　Mystic One's Flute(25％）
Lasmer Big Hammer(10％)　Immortal Skull Sweeper(10％)　
Scramo Boos(20％)　Assassin's Greeting(10％)　Milita Captain's Blood Dual Blades (?)(10％)　
Invincible Iron Arm(23％)　Divine Totem of the Jungle(25％)　
Titanica: Axe of Destruction(30％)　

2-Long Range Attack Strength　　　※Projectiles/non-weapon hits only
Sudden Burst(10％)　Oil Roller(10％)
Death Dragon's Bow (50 Bowgun) (10％)　

3-General Damage
Necklace of Deadly Screams(8％)
Magic Sealed Damage "Smash" % Bonuses (Variable)
Ghastly Gaze title (10%)

D　-Stylish Damage Increase　(Base Piercing Fixed Stacking SC Neck )
1-Back Attack
Chaos Overseer(20％)　Filthy Holdout Dagger(20％)

2-Back Attack Counter
Filthy Holdout Dagger(50％)

3-Counter　　　　　　
Sword of Revenge: Fragarach(20％)　　Reshpon Belt(10％)
Redeath: Scythe of Reaper(40％)　

4-Magic Counter　
Black Pearl Mist(20％)

③　Stat Increasers
E　-Base Attack Increase　(Base Piercing Fixed Stacking SC Neck)
1-P.Atk
Extreme One's Greatsword(30％)　Extreme One's Gauntlet(30％)　Extreme One's Handcannon(30％)
Unstoppable Reaver(30％)　Extreme One's Dual Blades(30％)　Lumberjack's Gray Axe(30％)　

2- P.Atk Booster
Dagger King Iniesta (5％～30％)　Soldoros's Decision　(10％～50％)　
※Bonus damage not available when others info you, but shows on your own stat sheet.

3- Counter P.Atk Booster
Locky's Bone Ring (30％) Halgi's Bone Ring (50％) 
※Does not stack with Iniesta/Soldoros.
Kuro Ring (40％)
※Unconfirmed, but assumed to be same as Locky.

4- M.Atk 
Terra Cotta ID(M.atk+50)　
※Limited uptime.

5-P.atk and M.atk
Soul Chaser(20％)　　
※20% of base attack, including enchants and subequip.
※No additional bonus from weapon masteries.

F-Piercing Attack Increase　(Base Piercing Fixed Stacking SC Neck)
1-Increases magic and physical piercing　 ※Determined by weight in your stash.　
Gravity Armor(60％)　Gravity Weapons(80％)　
※Max weight required for armor 432、for weapon 576+