imho for water stamping, distress is the best, especially the brighter colours. The colours lift with the water beautifully. If you are watercolouring the best ink I have found is India Ink black by Stewart Superior. It is made especially for watercolour stamping and colouring. I'm sorry I can't help you with copics...I don't own any.
Memories chalks are lovely to work with, nice and juicy and are great for soft finish in stamping and work well for blending. Hope this helps.