I will Rank CIA as number 1 after what they did in Chili , Cuba and Specially Russia.
I will Rank ISI as number two coz despite facing toughest Scenario We aquired the Nuclear Capability not to mention their covert operations in Kashmir and Afghanistan.
And Iranian Intelligance Agency as third after what they are doing in MiddleEast specially against Israel and their ops in Africa and Iraq describe nothing less than a Sting Capability.
The French have done well in fueling the proxies in Africa .
I will also praise the Chinese coz they have not only challanged the US but also defeated it in many spheres specially Korean Peninsula and unrest in Phillipenes and Taiwan.
The Russians have also did well when it comes to the game going on in south America.
When it comes to playing well with the money the US and Saudia Arabia has done an outstanding job. I mean the Saudis have Virtually strenthen Positions every where perticularly in westren sphere.
But by far Mossad is highly reputed for its ruthlessnes but the voilance in Iraq , Dfeat in Lebanon certinly raises questions. But they have done well in fuelling the unrest in Balochistan along with RAW. RAW alone would never had such a capability to aquire such strength in Afghanistan.
In short Every intelligance Agency has ups and downs in its Gaming Arena but its the capabillity to sting the nerve under pressure which makes it highly Ruthless and to be Feared From.
BTW any body knows who kidnaped the Indian Nucler guru.?