Thanks for this scenario!
I also wanted to share a macro for the fishing relic small fish components (Platinum Seahorse for part 1 and Mirror Image for part 2) that will save bait and time. These fish can only be caught between 3 and 7 seconds, the other fish are longer.
/micon "Cast"
/merror off
/ac "Identical Cast"
/ac "Cast" <wait.7>
/ac "Hook"