If you want a Rafa build that snowballs harder the longer bullets stay in the air—without waiting for endgame uniques—you're in the right place. This setup turns every multi‑projectile shotgun or ricochet-friendly weapon into a pinball generator: non‑crit ricochet chance + crit refresh loops + action skill weapon scaling. You'll feel it the first time a screen-wide cascade erases a pack, and you'll also notice the downside: sometimes the ricochet chain won't stop for seconds after the fight. I'll show you how to control that, keep Overdrive up, and survive your own chaos.

• Why Infinite Damage Snowball
• Skill Tree Allocation
• Suggested Point Phases
• Key Synergy Loop (Instinct + Herga + Overdrive + Sult)
• Weapon Priority Ladder
• Ricochet Enhancement & Probability Expectation
• Sample Weapon Spotlight: Kickballer (with Jacobs Part)
• Two Operational Rotations
• Defense & Sustain
• Boss Example: Soul (Shield/Immunity Phase)
• FAQ
• Summary

↖ Why Infinite Damage Snowball

The build creates exponential hit event density by stacking (1) multiple base projectiles, (2) added ricochet chance on non‑crits (40%), (3) action skill shotgun cannons that themselves benefit from skill damage and ricochet modifiers, and (4) duration extension loops (kills + crits). More hits → more crit rolls → more extensions → more ricochets → more hits. You're not literally infinite; you're amplifying event frequency until practical caps like enemy HP, map geometry, or a future patch intervene.

↖ Skill Tree Allocation

Red Line Focus:

Overdrive line: 

↖ Suggested Point Phases

Why each matters:

• - Instinct + Herga: Dual refresh vectors (kill + crit) overlap so variance is reduced; you don't stall if enemies become tanky or sparse—one vector covers the other.
• - Hostile Acquisition first vs Aaron Spark: If you die during ramp, the theoretical DPS doesn't matter; 50%+ lifesteal chance gives aggressive face‑range uptime.
• - Lateral Plinking: Ricochet density is multiplicative with projectile count: more secondaries mean more chances to proc future chains.

Rushing deeper damage nodes while skipping sustain results in lost Overdrive and inconsistency; early stability > flashy numbers.

↖ Key Synergy Loop (Instinct + Herga + Overdrive + Sult)

Why obsess over duration when damage looks instant? Because sustained Overdrive keeps movement speed, regen, and fire rate (or cannon cycle efficiency) high, which shortens the time between each projectile batch and multiplies roll volume.

Mechanism:

• 1. Activate action skill → baseline Overdrive window.
• 2. First crit(s) trigger Herga extension; first kill triggers Instinct extension.
• 3. Extensions overlap, pushing actual uptime beyond base.
• 4. Sult on kill doubles the active Overdrive stat bonuses for 8s. Kill cadence inside ricochet storms is so fast the downtime window shrinks to sub‑15%.

Effective Overdrive presence (any portion active) ≈ 85–90% of fight time once build matured (Level 30 snapshot, mid-tier gear).

↖ Weapon Priority Ladder

Acquisition Advice: Farm world drops while pursuing Onion shield mission chain; don't tunnel one gun—rolls with multi-pellet + ricochet synergy beat legendary single-shot vanity.

↖ Ricochet Enhancement & Probability Expectation

Critical piece: The enhancement granting 40% chance for non‑crit hits (with Jacobs license part) to ricochet. This flattens RNG spikes because you're no longer dependent solely on crit qualification.

Expected trigger math (independent Bernoulli approximation): Probability at least one non‑crit ricochet in a volley of n projectiles = 1 − (0.6^n).

Examples:

1. - 4 projectiles → 1 − 0.6^4 ≈ 87.0%
2. - 8 projectiles → 1 − 0.6^8 ≈ 98.4%
3. - 12 projectiles → 1 − 0.6^12 ≈ 99.7%

Interpretation: Increasing pellet count mostly eliminates dead volleys where no ricochet starts the cascade; that's why Kickballer-style splitting feels explosive after a couple of attempts.

Early volleys might partially crit (consuming crit-only ricochet pool) without spawning enough non‑crit chains; once multiplicity rises, secondary ricochets re-seed chains even off environmental surfaces (bug-likely).

↖ Sample Weapon Spotlight: Kickballer (with Jacobs Part)

• Behavior: Primary orb → splits into 3 additional spheres (total 4). Each sphere is an independent projectile with own crit/non‑crit rolls & ricochet evaluation.
• Outcome: 4 base rolls * (crit chance + 40% non‑crit proc) → spawn network of secondary projectiles. Screen clutter = success metric (to a degree).
• Play Tip: Fire at chest-level into clustered enemies or angled metallic surfaces to intentionally promote early bounces if crit lines are inconsistent.

↖ Two Operational Rotations

1. Safe Mode Loop

• - Pre-engage: Shields full, Overdrive off cooldown.
• - Open: Activate skill, quick strafe to widen pellet spread arcs.
• - Volley 1–2: Acquire first kill for Instinct, lean into lifesteal with Hostile Acquisition.
• - Watch: If Overdrive timer <30% and no crit chain yet, reposition, pick a squishy add to guarantee the kill-extension.
• - Exit: Once enemy density thins, withhold fire for 1–2 seconds to avoid needless ricochet lag before moving zones.

2. High Burst Loop

• - Pre-load: Enter area with skill ready; tag a weak mob for guaranteed fast kill.
• - Aim deliberately above center mass of priority target (Soul or similar) so ricochets can arc downward into adds for additional kill-based extensions.
• - Dump 3–4 rapid volleys; maintain lateral movement (ricochets sometimes back-trace; motion reduces self-damage risk if splash variants are used).
• - If boss shields phase-gate (immunity), stop firing last 0.5–1s before immunity pops to reduce ghost ricochet persistence delaying next phase recognition.

↖ Defense & Sustain

Primary Shield Choice: Onion Shield (segment-based; each broken segment grants 2 seconds full immunity). With 4 segments you can chain up to 8s of staggered invulnerability per full break cycle.

Source Path: Faction mission that appears after defeating/sold early campaign boss—travel south from Launchpad area → mission line culminating in Sludgema encounter → repeatable boss chance to drop Onion.

Your biggest threat is uncontrolled residual ricochet or point-blank splash. Immunity windows let you stay exposed long enough to feed kill extensions instead of turtling.

Alternatives (if Onion not yet acquired):

• - High capacity + recharge delay reduction + on-break heal -> smoother between-volley recovery.
• - Amp shields that boost first shot damage: Acceptable only if lifesteal comfortable; avoid if you're falling over in dense arenas.

Lifesteal via Hostile Acquisition: Treat as mandatory early. Once you have reliable ricochet consistency and comfort with movement, you can experiment with a pure damage alternative (e.g., Aaron Spark style nodes if/when available).

Emergency Mitigation: If ricochet chain becomes visually or performance heavy post-fight, disengage LOS, swap to a single projectile sidearm to starve further triggers, then zone transition to flush the lingering chain.

↖ Boss Example: Soul (Shield/Immunity Phase)

Observed Sample (12 runs, Level ~30 gear, mid-roll enhancements):

• - Phase 1: Time to strip shield ~20s average (variable based on early ricochet luck).
• - Post-Immunity Burst: Shield break to health deletion window 2.8–6.4s (median ≈3.5s). The lower bound occurs when initial burst volley triggers >2 ricochet waves immediately.

Tactics:

• - Don't oversaturate right before immunity barrier rises; wasted ricochets = visual clutter without health progress.
• - Aim to chain off spawned adds for dual purpose: kill extension + environmental ricochet surfaces.
• - If you experience a dead string (3+ volleys no visible cascade), reposition 15° off original axis—angle changes collision geometry increasing chance of secondary bounces.

Common Mistakes & Fixes

• Mistake: Tunnel on Legendary rarity instead of pellet architecture. Fix: Evaluate shots per trigger and ricochet compatibility first.
• Mistake: Overshooting into open sky (no surfaces) causing lost bounce potential. Fix: Use mid-height or slightly angled cover planes.
• Mistake: Dropping sustain nodes too early. Fix: Keep Hostile Acquisition until you survive two consecutive high-density arenas without second wind reliance.
• Mistake: Assuming more raw gun damage > skill damage lines. Fix: Shoulder cannons count as action skill weapons; skill damage % additive/ multiplicative layers often outpace generic gun rolls.
• Mistake: Staying during post-fight ricochet storm. Fix: Loot later or fast-travel reload to prevent accidental self hits (if splash variants present).

↖ FAQ

Q1: I can't get the Onion shield yet. What's the best interim defense?

A: High capacity + fast recharge combos plus Hostile Acquisition lifesteal. Even a plain adaptive shield with regen lets you brawl safely while farming Onion later.

Q2: My ricochet chains sometimes just… stop. Normal?

A: Yes. Without enough simultaneous projectiles, variance causes dry streaks. Increase pellet count or angle shots toward clustered enemies/structures to increase early branch formation.

Q3: No Jacobs licensed part roll—am I doomed?

A: Not at all. Use Torque splash or any multi-split projectile base; let shoulder cannons handle a large portion of the chain until you secure the enhancement. Build loses some explosive pace but remains functional.

Q4: FPS drops after big fights—what can I do?

A: Lower particle settings, reduce post-processing, fire fewer back-to-back volleys when enemy HP is already effectively zero, or change zones immediately to clear lingering ricochets.

Q5: Soul fight feels slower than your timings. Why?

A: Likely (a) fewer early crits (roll more crit chance gear), (b) using a single-projectile weapon, or (c) not staggering immunity—dumping volleys during invulnerability wastes chain potential that could have been saved.

Q6: Should I ever drop Hostile Acquisition for pure damage?

A: Only after you can clear two high-density arenas without second winds and your movement discipline is solid. Damage dead players do zero DPS.

Q7: Enhancement with +1 ricochet vs 40% non-crit—which first?

A: Early: +1 ricochet is fine when pellet count is already high. Long term: 40% non-crit drastically stabilizes proc frequency and reduces bad streak variance, so prioritize it once found.

↖ Summary

You now have a structured Rafa blueprint: loop crit + kill extensions (Instinct + Herga + Overdrive + Sult), feed them with dense projectile volleys (Jacobs-part multi-shot or Torque splash), stabilize with Hostile Acquisition + a segmental immunity shield, and exploit the 40% non‑crit ricochet enhancement to collapse variance. If a future patch trims environmental bounce or non‑crit chance, pivot to splash radius + skill damage stacking while preserving the duration engine. Track your own shield break → boss kill intervals; tightening that metric is the clearest signal you're mastering the rotation. Go test two weapons back-to-back (one high pellet, one single-shot) and feel the probability math in action—then refine from there. Enjoy the chaos while it lasts.