The +1 Day Multiplier Buildable is the apex trade item. At 10,000+ Pearls per blueprint on the active player market, it dominates the meta by orders of magnitude. This is how to farm them efficiently.
Coordinate first
Solo-clearing a Rival Rig is possible but risky. The minimum efficient crew size is 3 — one for DPS, one for clearing trash, one for healing support.
The route
Trigger the Radio Tower first to ping the rig coordinates. Plot a course to the nearest rig — Tier 1 is always the closest and the easiest.
Tier 1 clear
Open the Special Chest, loot the +1 Day Multiplier blueprint. Build the constructed item on your raft immediately — blueprints convert to the buildable when placed.
Tier 2 and Tier 3
Higher tiers offer more challenging thermal and DPS checks. The Tier 3 rig is the only one that drops the rare Vault O'Pearls cache at the end of the run.
Trade strategy
If you clear all three rigs, you have three blueprints. Convert two to trade, bank one for your own Day 100 acceleration. Net positive Pearl income of 20,000+ from a single coordinated run.