Starting chance of finding Int: 100:1,000 or 10% chance
Each point of Attention to Detail adds 1 point to the 100, and also drops one point from the 1,000.
So if you have an ATD of 10, your odds are 110:990 (11.1%), and if you have an ATD of 150, your odds are 250:750 (33.3%)
Furthermore the amount of Int you find each time is a random number from 1 to (your ATD + 1)
In other words, with an ATD of 35, you will get a max Int hit of 36, and 14% of the missions that you conduct will produce Int for you.
For me, with an ATD of 295, I'll see a max Int hit of 296, 42% of the missions that I conduct will produce an Int hit.
So, if I run 10 missions, I'll get an average of 4.2 int caches, and between 4.2, and 1243 Int. In reality, the average will be approximately 600 Int for every 10 missions I conduct.
Right now, on dossier 45, it will take me 25,000 int to make the mission.
So, it's not a bad idea to hit up your Int if you want to see some good CE....I expect that Dossier 45 will net me about 300,000 CE.
On the other hand, once I've completed the 50 Int Missions, those 295 points of Attention to Detail become, well, useless. So I'm loathe to push more points into it on my PER....though I anticipate that the last 5 dossiers will be:
30,000
35,000
40,000
45,000
50,000
Which is a total of 200,000 Int. Which for me means, by my guestimate, I will need to conduct approximately 3,300 more missions to collect that amount of Int....that'll take a while.
Seeing as I've been playing for 4 months and not hit that number of missions yet, and as you go on, they're more and more expensive.
Thinking down these lines, I'm probably going to bounce up my ATD just a bit more so that these numbers come down a bit....
NS