The C.A.R.R.I. Protocol event has fundamentally changed Marathon's solo queue experience. With proximity chat enabling real-time negotiations between enemy Runners, your build needs to excel at three things: quick engagement decisions, reliable escape routes, and clutch survivability when talks break down.
Event-Specific Shell Selection
Thief emerges as the S-tier choice for C.A.R.R.I. solos. The Light Carry passive lets you maintain full movement speed even when loaded with negotiation bait — valuable loot you can offer other Runners. Your X-Ray Visor reveals exactly what enemies are carrying, giving you critical intel before opening negotiations. Most importantly, Pilot Drone can secure Holotags from a safe distance when proximity chat fails and firefights erupt.
Vandal remains the most versatile option for Runners who prefer combat readiness over pure stealth. Combat Flow grants movement speed after kills, letting you reposition quickly after negotiations go south. Your Micro Jets provide vertical escape routes that other shells can't match — essential when you need to break line of sight during heated discussions.
Assassin works for experienced stealth players, but Shadow Step's reduced footstep audio becomes less valuable when you're actively communicating. Save this shell for traditional solo queue once the event ends.
Weapon Loadouts for Negotiation Scenarios
The M77 Assault Rifle with Pinpoint Barrel (Traxus Rank 15, 2,000 CR, 7 Anomalous Wire) provides the perfect balance of mid-range pressure and hip-fire accuracy during close conversations. Pair it with the Oracle Lens optic for rapid target acquisition when talks break down — you need to identify threats instantly in multi-Runner scenarios.
For your secondary, the CE Tactical Sidearm excels at finishing wounded enemies who break agreements. The Flash Draw Chip (Arachne Rank 6) ensures lightning-fast weapon swaps when negotiations turn violent. This combination covers both honorable trades and backstab scenarios.
Avoid slow-handling weapons like the Demolition HMG or Longshot during the event. You need weapons that perform well during conversation ranges, not long-range picks that leave you vulnerable during proximity chat.
Critical Mods for Event Success
The Suppression Muzzle becomes invaluable during C.A.R.R.I. encounters. When multiple Runner groups converge on high-value loot, a suppressed weapon lets you eliminate threats without alerting every nearby team to your exact location. This Prestige barrel mod requires significant Traxus investment, but the tactical advantage justifies the cost.
Motionsense Chip provides early warning when enemies approach your negotiation zone. Since proximity chat requires close range, this Enhanced chip gives you precious seconds to prepare your opening offer or plan your escape route.
Background Process shield generation works perfectly with the event's extended conversation periods. The passive shield buffer builds during lengthy negotiations, giving you extra survivability when things go sideways.
Faction Priorities for Event Builds
Traxus becomes the priority faction during C.A.R.R.I. The Ping Duration upgrades (Rank 15 and 26) extend your information advantage during complex multi-team scenarios. When three Runner groups are negotiating over Holotag spawns, knowing exact enemy positions for extended periods becomes game-changing.
Cyberacme's Loot Speed bonuses help you grab negotiation materials faster, but these pale compared to Traxus's tactical advantages during the event.
Event Survival Tips
Remember that proximity chat creates temporary alliances, not permanent truces. Always position near cover during conversations, and never fully trust verbal agreements when high-value Holotags are involved. The most successful C.A.R.R.I. Runners master the art of beneficial cooperation followed by precise betrayal timing.
Use the event to practice reading other players' intentions through voice patterns and positioning. These skills transfer directly to standard ranked play, where subtle behavioral cues predict enemy actions.
The C.A.R.R.I. Protocol rewards Runners who balance social engineering with combat readiness — exactly the skillset that dominates Marathon's highest competitive tiers.