We can include it on the relic description for next week if you'd like.
This relic is slightly inconsistent on purpose, Slayer you CAN choose b2b tasks, farming contracts you CANNOT. Here's why:
Slayer was originally chosen to not give b2b tasks for balancing concerns from the devs who wrote it but there is no explanation in game as to why, this is a league so we can ignore that because it's not the main-game.
Farming Contracts however are described in the lore of the guild and why guildmaster Jane wants you to do it purely to rotate the crops as she describes, going against that would go against the reason for the contracts in the first place?
I know it may not make much sense to some people but it does to me at least