Yeah, apologies for being unclear. I had meant that the other three dissolvent-type-specific materials (mist dill, wyvern wings, and bear fat), the ones that fill the same spot as Mogpom and Blue Cloud Coral, except in different types of dissolvent, could already be obtained by retainers (BTN/combat). Most of the time when a dissolvent is needed for a recipe, there are multiple recipes that only differ by dissolvent type. But, I guess MND and INT generally were paired, so this does make recipes that were shared by caster/healer and not any other class easier to make.
Yet, still, as Roth said, Volcanic Rock Salt is still not retainerable, and even besides that, there are often choices that don't use dissolvents and thus require fewer mats overall (items with dissolvents in their recipe immediately get 7 extra mats and 1 extra synth added to the mix just to make the dissolvent, and generally still take as many mats as non-dissolvent recipes). Again, when 3.1 comes out, I'll re-evaluate everything I've put for the non-CRP/ALC classes in the guide.
Right now, if this change makes it easier for you to make a healer/caster item for desynth, go for it. But, I've found that I can't keep up with both price fluctuations (which aren't even constant cross-server so I have to guess what is specific to my server and what isn't) and patch changes if I make them every time either changes in a notable way...
Top priority for this guide is updating CRP and ALC.