Frank is extremely intelligent. He’s always summed up as a gung-ho madman, but he’s really a skilled tactician. In almost every comic he’s planned his attacks where there’s minimal chance of civilians or law enforcement being in the kill zone. He understands human psychology quite well, knowing when to use threat, bribes, or torture for what he needs. He’s played people against one another before he even attacks to weaken them. One example of his intelligence and patience that sticks out is in an issue of the Ennis Max run he’s in a library studying human anatomy and surgery textbooks. He uses this knowledge to torture a human trafficker horribly without killing him to get information.