The Kriigel Agents bring something that Tohaa players have been asking for. Pheroware that isn't attached to a Symbiobomb. I personally love Mirrorball. Though I do have a history of being attacked by Nisse and Yaogats. The Kriigel also add a Light Smoke Grenade Launcher that can be in a link. More regular smoke for Tohaa (unless that is a Spiral Corps only profile).