Sluttering you mention can be caused by things:
1) You are running ASW off but don't get stable 72 fps
2) You are running what is called "45 HZ forced" in OTT. This is really lame setting that limits your fps to 36, but does't actually use ASW interpolation!
To troubleshoot:
1) Run OTT and set ASW Mode to 45.
2) Run DCS and hit ctrl-pause once. See how much fps you are getting. You should be getting 36 fps stable.
3) Run Oculus Debug Tool (you can find it here "C:\Program Files\Oculus\Support\oculus-diagnostics") and make sure that "Asynchronous Spacewarp" is set to "Force 45fps, AWS enabled"
You should not be getting any micro slutters now. If you are still getting them try lowering your settings till you get stable 36fps.