From my experience using drip irrigation with rockwool blocks the constant drip might cause you some problems. Overwatering becomes the main issue. If this is the case then a simple timer and some experimentation with your watering cycles should do the trick.

What im pretty sure your describing is building some sort of NFT(nutrient flow techinque) system where you have your plants in hydroton like dwc but you have a constant steam of nutrient solution going through the tubing. Because its slightly slanted it drains by gravity back into the res, where it is then pumped right back up to flow downwards touching the roots as it goes. In that case, i have no experience and don't feel comfortable giving advice.