Takitaro is still listed as an r70 fish, are you sure that's what gave you 0.01 at 76 dSkill? It should give ~0.30. An r55 fish would give you ~0.01, like Giant Catfish or Mahi Mahi. In addition to Takitaro, try Megalodons from the MB - they're also r70 and also obtained often from minion-seeking FSH ventures. There's also Aetherlouse and Worm of Nym - I don't know how much they're up for on your server, but they're easily obtainable by minion-seeking FSH ventures, and only useful for Zodiac, which most people either have or don't care about at this point.


As for which third desynth to get, well, I'd hold off right now and leave yourself flexible for when the next patch comes out with desynth content. HW doesn't have any desynth-specific content - desynth was super useful at launch for obtaining materials, but the materials markets are getting saturated by actual gatherers and prices are plummeting on my server. It's no longer profitable on Faerie to desynth just for the mats, though it's not much more expensive than making them, so it's still good for getting mats while leveling desynth. Just, instead of making a profit while you level, you break almost-even. Soon, it'll be at a loss to level, but the guide's recommendations should still work just fine. Just don't expect to make money where I say you might.

When the next patch comes out with desynth-related content, it may be locked to one or two classes like Mastercraft Demimateria was locked to GSM at first, then later BSM/ARM/GSM and FC3s are basically locked to LTW right now. So, SE may suddenly make it so everyone needs a specific other class, like, say, CRP or something, and if you have your third slot free, you can blitz it. Leveling two should take enough resources for now anyway.