You're very lucky then, because all of my insurgencies have been taking at least a days worth of my CR to quell; not just this latest one.
Ghundy Ghar took me probably around 330CR, which is great because that's an average of -3 per click. Fortunately, I still haven't purchased the incentives for Combat Readiness Spent, so I still have those to use if necessary.
It is great to have Reputation so that the insurgency level doesn't rise as fast if you can't lock it down, but it would be nice to have something that helps you lower it faster too. It seems a hit and miss thing with how many 'hits' it takes to lower it completely. Has Mike written anywhere what the chances are, or how it is figured out?
I'm not sure what the formula is, but it might generate a random number between 1 and 4. If the number is a 3 or 4, then generate it again (which explains the high number of ones and twos).
I like the idea of something that helps lock it down. Perhaps Situational Awareness could be used there. The upper limit for killing insurgency could be: (SA/20) + 2, and the lower limit at 1 of course.