Well honestly If I wanted to go that route - Double strike that is, Id most likely go with Cactus instead.
I really think its great Cepha has skill act, but it feels like she is missing just la little something, a very specific something to push her towards a more defined role. Maybe if her DS was guaranteed on 1st turn and then the usual 40/50% after wards. That would be pretty decent solution to her being more identifiable as a character.

As far as I have considered all things, I think the last team will be a debuff+Kerria team. She is just way to broken to ignore and not use.
To bad we cant have 5 teams. I was wanting to go with the Double strike just for the heck of it.