Usuginu Octopus. They will get him to 340 or so. From there Tinker's Calm and Bacon Broth will bridge the gap to 390 fish. I just did the grind. Isle of Bekko. The Octopus have a unique bite. They have the hard crunch on the pole and I ignored all other bites as reeling them in took longer by a large margin. I ended up burning through around 600 Live Shrimp and got around 120 Octo. It took me to slightly under the 340 mark and I began the process of blowing up all my 390's. When I stopped using Octo I was getting .05 per in Desynth and I still couldn't reach 390 opening so Tinker's Calm and Bacon Broth are not optional but he will only need 2 of each, HQ and he can burn stacks of 390-400 from there on in.