Semax + Selank: what does “stack” mean in practice vs in blog slogans?

The Semax vs Selank guide stresses different parent peptides (ACTH line vs tuftsin) and different Russian clinical brands—then notes that forum “stacks” are not a clinical evidence base. If you’ve tried one, the other, or both, how did you decide what you were actually comparing (focus vs calm, timing, overlap)? What made you stop combining things? Experiences and caveats welcome; please don’t prescribe a stack. Link thoughts back to the guide if useful. Not medical advice.