Ayatan sculptures: use or sell?

Hi! So I'm 250 hours in, and haven't used a single Ayatan sculpture. I'm sitting on a small gold mine, whether I use them for Endo or sell them for Platinum. I just started purchasing Primed mods which I assume are the main Endo sinks, but on the other hand I haven't done any Endo farm run yet.

So the question is: are Ayatan scultpures supposed to be an important source of Endo or can I get enough simply from Endo farm runs?