1/372 Opal Silk
1/1207 Saber Shoot
So, I'm certainly up there for having the worst record.
I fished most of the Lik, and bought most of the Gugru. I ended up selling all gear worth over 70k, and went ~6 million gil in debt to my brother, but I made all the money back in a relatively short amount of time after I got ebisu and sold Gugru.
As for advice: You haven't gotten close until you start becoming superstitious while turning in fish to Zaldon. E.g. Equipping all fishing skill+ gear, /bowing to Zaldon upon entering/exiting his room, and of course moon phases.
Once you start checking your inventory, mog safe, mog locker, and storage for a saber shoot/opal silk that you "must have accidentally gotten when you weren't looking," you're almost there. Maybe. Probably not.
Edit: On another note, I have 21 matsya. I fished a bunch of Cave Cherax for the Fish Ranking contest, ended up with a bunch of ex bait, and decided to stock pile matsya when/if they decide to make them guttable.
I have all my statistics
here, but it roughly comes out to 2 catches per 12 ex bait (Line snaps, lost due to lack of skill, jelly fish, mobs cause loss of bait). You end up making only a little bit more gil/hour by fishing/NPCing matsya, than you would if you just NPCed all the cave cherax to a normal NPC (Zaldon only gives you 1/2 the gil).