I suspect for both DKs and Warriors the following is likely the best "manageable" route:
First, identify your income of Rage/RP versus how many abilities you use in that time.
Then, macro Rune Strike (or Heroic Strike) to as many abilities so that you still don't "break even" or "starvate", but you got some good output.
Lastly, use the remaining resource manually, on more strikes.
This way for me as a DK I got a solid automated output of RSes going while I can choose to either reserve or dump the remaining RP into more RS. Specifically I have it macroed to Scourge Strike and Death Strike and Death Coil (I use that when I hit 100 RP), but not to Icy Touch, Plague Strike or Blood Strike.
-- (The Death of Rats, Terry Pratchett, Soul Music)