[Suicide Junkie]

I'm not too knowledgeable about the guts of intel, but from what I've read here, what matters is the total cost of the projects you attack with. One 100,000 every 5 turns should be about the same as one 20,000 every turn.

Also, If you have only recently started attacking him, he probably has a lot of stored up points that you will have to deplete before your attacks start to succeed. He could be blocking your attacks without putting points into defense, if he'd already invested some points, you see?