[quote=KindledBeast]
Attack him mentally and or have him attack himself.
[/quote]

Well my friend you do realize that Mental attacks fall under the category of Psionic Energy, thus he will react to that energy like he would to other forms :D

@Katherin: The maths was meant for the example, I'll try to be as lucid as I can through words and leave the rest up for moderation; both self and impartial.