That's interesting. When I was doing this quest I didn't pay any attention to the day of the week, moon phase, or anything, and fished up the Lancet Jagil in no time at all. I fished on the beach on Purgonogo where Serra spawns. Unfortunately, it was so long ago that I don't recall rod or bait used, sorry. Though it was probably a composite rod with minnow ... I do know for certain though that I paid NO attention to day of week or moon phase.