Better to steal something good than make up something bad myself Another option could be to have it lead a hunting pack of salamanders/razordons, some skink handlers and some kroxigor (and possibly some new stuff while we're at it ). You could make it into a rapid assualt or line-breaker battalion. They're all fairly fast, and they have a decent amount of firepower to function as linebreakers. And it is tied together thematicly by mostly relying on stupid but powerfull junglebeasts the various skink handlers guide to smash into the opponents lines by prodding them with sharp sticks so even that works well. It'd also give kroxigors a potential nice niche.
Could be simple enough, battalion could be something like: Trog 3-5 unit combination of razors/salamanders or Kroxigors Ability 1: Drawn to screams affect all units in the battalion Ability 2: Lords of space and time affects all units in the battalion Maybe it is too powerful, just a fast idea for a sudden terror strike. Rolling 5-6 on LoSaT would be scary...