Revmob, Chartboost or both?

Hello,

I post recently my experience with Revmob in around 1 year with my app: http://forums.coronalabs.com/topic/54499-revmob-horror-read-please-before-of-opinion/

Now I have a new game for publish and I don’t know if use for interstitial Revmob, Chartboost or both. Which is better for you? Which is your eCPM?

My fear with Revmob is have the same experience that in the last post, for me an 2 - 4 eCPM is good if Revmob pay all clicks and not shutdown, what do you think?

Thanks in advance,

Regards