Psychological warfare group:
Yolen: Hoid. Because Hoid.
Roshar: Jasnah and Taravangian, because Jasnah is good at insults and Taravangian is good at mind games
Scadrial: Wax and Wayne, because the two of them are just completely baffling sometimes. (Also, just because Wayne.)
Sel: Galladon and Sarene, because Galladon can make people depressed, and Sarene, because of how quickly she managed to cause someone to hang themself.
Nalthis: Lightsong and Nightblood, because both of them are at least somewhat crazy.
With this team, there should be no problems driving everyone insane! (Well, everyone that wasn't already crazy)