Priority 1: Mythic Egg (500 Teeth)
The Mythic Egg is the single highest-value Teeth sink. Prime Rex and Kraken are the only dinosaurs that survive Rebirth, and their trade values (10M and 15M respectively) make them the best long-term investment in the game.
Priority 2: Permanent Revenue Multiplier (300 Teeth)
After securing at least one Mythic, spend 300 Teeth on the Permanent Revenue Multiplier. It survives Rebirth, stacks with VIP and 2x Money, and is the largest single Cash boost available in the Teeth track.
Priority 3: Hatching Speed Boost (200 Teeth)
Once you have the Revenue Multiplier, spend 200 Teeth on the Hatching Speed Boost. It clears incubation queues faster and stacks with the 2x Hatch gamepass for compounded reduction.
Priority 4: Offline Retention Multiplier (150 Teeth)
The 150 Teeth Offline Retention Multiplier is the lowest-priority Teeth upgrade. It only matters if you log off for long stretches between sessions.