I think you misunderstood my post. I mean you should only use RvS when you have 4 cp and are going to eviscerate right after, not end like 5 cp end. If you were at 3 cp, and then sinister striked once and got to 5, you would just eviscerate, for it would be a DPS [b]gain[/b, even without RvS]. Using RvS at the beginning, which this guide says to do, lowers the effectiveness of ruthlessness.
Here is a quote from EJ:
"RvS should only be used when you have 4 combo points and are about to do a Rupture or Evis," and then of course the SnD thing you mentioned, which is beside the point.