Partly updated for Enshrouded 1.0— 1.0: the unlock cost; the rest is pre-1.0 wiki data

Breach
An overpowered enemy suffers 100% more melee damage for 3 seconds. Overpower To overpower an enemy, fill their stun bar by attacking while they block or by parrying their attacks.
Where Breach sits on the 1.0 tree
In the Warrior area. The cheapest way in from a starting point buys 8 nodes for 12 points, this one included (one rank each).
Builds that use Breach
2 preset builds tagged BREACH — defining picks first, then ranked by tier (S → A → B).
- One-Handed WarriorWarrior
One-handed melee for damage: Warrior's Path and Slasher at full rank, Swift Blades and One-Handed Specialization, Power Parry and Heavy Handed to overpower, Merciless Attack, Opportunity and Breach to punish it, and Veteran with Battle Heal to heal on crits.
- Endgame MetaHybrid
Every one of the 212 points: two-handed Warrior (Barbarian's Path for the axe, Titan Edge for the greatsword, Slasher, Veteran, Relentless, Whirlwind Crescendo) in Heavy and Shiny Plates, Thunder and Wand Mastery for a shock wand, Blink, and the full Healer line. Pyromaniac is not on the 1.0 tree.
Related Warrior skills
Same archetype — likely candidates to slot next to Breach in a build.
Absorb1pValues in the 1.0 files: 4% per rank, 3 ranks.
Constitution1pIncreases your Constitution attribute by 1 Increases Health by 50 per Attribute Point
Finesse1pValues in the 1.0 files: 15% per rank, 3 ranks.
Heavy Handed1pAn enemy's stun bar is increased by an additional 20% when attacking into their block with a melee weapon.
Heavy Plates1pValues in the 1.0 files: 4% per rank, 3 ranks.
Purification1pAfter defeating a Shroud infested foe with a melee weapon you replenish +5 seconds of Shroud Time. Shroud Time Should this time run out, the Shroud will consume you.
Shiny Plates1pValues in the 1.0 files: 4% per rank, 3 ranks.
Strength1pIncreases your Strength attribute by 1 Increases Melee damage by 5% per Attribute Point
Sources: game files 1.0 + Keen Games 1.0 patch notes (changelog, combat changes) for the unlock cost; enshrouded.wiki.gg (pre-1.0) for the description and effects.