Definitely not competitive, but I'd like to try Sunclaw Templehost with 3x10 warriors for battleline and Carno Oldblood + Thunderquake templehost and whatever support heroes I'd have points left for. Just a big dino stampede with -2 rend carno jaws.
For competitive point of view, I see no way to fit two battalions, without hurting the list.
How is the carno getting -2 rend on it's jaws? The sunclaw batallion can only have an oldblood on foot or the sunblood.