Ruthless Justice for Criminals: Friendly characters with The Hand keyword modify their attack values by +1 when attacking characters of a lower point value than themselves.

Matt, You Don't Want to Do This: Daredevil can use Exploit Weakness, Leadership, and Shape Change.

Does Daredevil get to modify his own attack value with Ruthless Justice for Criminals?
Yes. A character is always friendly to itself and Daredevil does have The Hand keyword... now all you need is an opposing character that costs less than Daredevil and you are ready to use this special power.