IMPORTANT UPDATE 9-Mar-21 10am UTC
Based on the findings in this thread it looks like an optimal player is 99% guaranteed the required points using Tier 1 sigils, assuming all ravens caught and no battles lost.
The most recent event that closely resembles this scoring method is “Raising Nefertani” on 7-Dec-2020, even if that uses two different rewards (essentially just points). This event scales harder though (50%), so it could benefit from people posting their encounters (preset map) Tower-of-Doom style and revealing the hardest-scaling troop - might result in 10% difference in total point take. Historically with these scaling events, a handful of Tier 4/6 players will gather enough points to allow everyone else to skip the shop.
Shop Tier 1 has 90+% of getting 2367, 1/30 of 71,000 for reward 12
Everyone in this screenshot would have reached 2367 by 67 battles. Tier 1 gives 66-68 battles.
Battle Priority: Battle any non-Mosasaurus troop whenever possible.
[Ultra-rare] Mosasaurus: 6 Booty = 6 pts
[Epic] Bonnie Rose: 8 Booty = 8 pts
[Epic] Captain Skullbeard: 8 Booty = 8 pts
[Legendary] Kraken: 10 Booty = 10 pts
[Legendary] The Maraji Queen: 10 Booty = 10 pts
[Mythic] Megavore: 12 Booty = 12 pts