"Minion gathering mode" actually meant the Fishing Pool Hub addon running with the 'Minion' box checked. :D Sorry for the confusion.
Also, to catch Nepto Dragon, you have to use Patience II and Strong Hookset as soon as you have the buff and are fishing with northern krill. You'll instantly catch the Nepto Dragon then. At the moment, the bot just fishes normally, which results in 100% of the quest fish getting away. Had to do it manually and it worked on the first try. Hope this helps. :)
Also, to catch Nepto Dragon, you have to use Patience II and Strong Hookset as soon as you have the buff and are fishing with northern krill. You'll instantly catch the Nepto Dragon then. At the moment, the bot just fishes normally, which results in 100% of the quest fish getting away. Had to do it manually and it worked on the first try. Hope this helps. :)