A little update. Knights with a Starpriest at their back were extremely effective. Smashed through a Stormcast team and a Liege-Kavalos without taking a hit (Sotek cursed the OBR with snake eyes on a 3" charge).
At 500, the OBR were quite a bit tougher. They added a Boneshaper, Mortek Guard, and the Nightmare Predator endless spell. Bastiladon held the line and zapped / whacky-thwacked everything that got near it. Now I'm looking at the jump to 750. I was going to add Scar Vet on Carno, but I'm wondering if I'm better off fishing for mortals. Got two options that I'm going back and forth with:
Leaders:
Scar-Vet on Carno (general)
Skink Starpriest
Battleline:
Knights x5 (spear)
Behemoths:
Bastiladon
or
Leaders:
Skink Priest (general)
Skink Starpriest
Battleline:
Knights x5 (spear)
Skinks x20 (boltspitter and shield)
Behemoths:
Bastiladon
I guess the math suggests that buffing the daylights out of the carnosaur is going to give me consistently more damage. However, my skinks have been such an absolute wrecking crew in the past dishing out mortals, and it seems like mortals are the way to go against OBR, what with them ignoring the little rend we have and being able to reroll saves.