Help understanding hunts

[ShinHaru]

For the hunt not only week and daily mark bill, there a open world hunt activity happening on every map with B Rank, A Rank, and S Rank.
The Rewards:
B Rank- 5 Allied Seals, 30 Myth, 5 Soldiery *1-2 hours spawning time after defeated
A Rank- 20 Allied Seals, 80 Myth, 20 Soldiery *3-5 hours spawning time after defeated
S Rank- 50 Allied Seals, 200 Myth, 50 Soldiery *35 hours -48 hours at least to spawn a S rank
**Correct me if there any mistake.

Recommend join a party to get a full credit of the rewards.