I continue using a NSI-189/PRL-8-53 combo with very good results. All the benefits of NSI-189 really get amplified.
I am taking a few days brake because I am having mental fatique also. Fortunately PRL-8-53 is a dopamine agonist and not a dopamine releaser as I was thinking. Hopefully my brain will adapt in the extra stimulation and I will have the extra functioning from this combo all the time! My results are very similar to what Snoopy described before.
I bought a bulk amount of tianeptine sulfate and PRL-8-53 as I believe are the two best chemicals in combination with NSI-189. These are from the same source I am getting NSI-189. The source was third party tested for NSI-189 from me and another member and in general seems very legitimate and the PRL-8-53 they sent me appears the same as the one I bought from new star nootropics.
Anyone interested for PRL-8-53 or tianeptine sulfate I can ship some for less than half Ceretropic has it.