This is mostly true. First of all, my list would have been for double dps, cheap shotting both and then going into a kidney on the second to get cheap shotted (obviously redirect as well). This order works well for two spell casters. However, I don't understand why you use ambush? It has a lower poison proc chance, can't trigger Dispatch, and is horrifically expensive without shadow focus. Yes, it does hit hard, but not as hard as the extra poison and occasional dispatch proc will while giving the same number of combo points.
Also, this order is mostly for when you have either failed to sap (for whatever reason) or when you sap healer, open on dps with cheap, then return to healer with garrotte/cheap (I kinda like cheap as I will put rupture up and benefit from no running away. I feel we have plenty of interupts as is with kick, gouge, and kidney).
---------- Post added 2012-11-12 at 11:34 PM ----------
While I do agree this is a little energy heavy, keep in mind that Muta gets 20 extra energy right off the bat. Assassin's Resolve
Back on "topic" rogue abilities are a bit energy heavy in pvp imo. Basically, we spend most if not all of our time generating cps in order to use utility moves such as Kidney shot. While this is OK in that we do excellent passive damage through our auto attack+poisons while making our opponent's life miserable, it still doesn't feel quite right to sit on combo points all the time so we can get a clutch deadly throw or KS off. Very effective all the same...