In terms of max dps which is what you are mentioning, casting healing touch "on CD" would be a really bad choice. Superbad will cast Healing Touch (if Bloodtalons is specced) when we have 4+ combo points or if predatory swiftness proc is less than 1.5 seconds remaining. This is because you want to use the extra dmg from bloodtalons on either a rip, ferocious bite or rake. By using healing touch on CD you will most likely end up using the dmg increase on shred only which is a huge dps loss.
If healing touch isnt being used at all, I suggest you post a logfile and handnavi will help you