I like how its pre-death Caiera. Post death won't be much use.
Anyway, I can see Caiera being a much better and stronger user of the Old Power (when she died, it flowed into Hiroim, suggesting she had a much larger reserve). Also, better fighting skills. So I give it to her.
Yep. but besides this, they would never fight. I mean Skaar was pretty ignorant when they began to flesh him out, but in character, and based on the characters recent history, he would never fight his mom. His dad is another story.