Well, 308 ATD gives me 59% likelyhood of getting an Int hit on each mission, with that Int hit being from 1-309, so an average of 154 per hit.
That works out to an average of 91 Int per mission I conduct right now.
Not half bad.
And, I just did 23 missions, which I calculated to be enough to put me over the edge to getting the next Dossier, and 23 missions gave me a rate of return of just about 105 Int per mission, so the averages were good to me.
I've got enough Int for my next hit, and only have to wait 8 hours for me to gain enough CR to make the hit.
This one will be worth 250,000 CE. That'll put me back into the top 10.
Alas, I expect the next level will take me 30,000 Int, which, according to my current stats, will take approximately 329 missions (with a rate of return of 91 per mission)