IMO even with more hp and def boost, the new Rocs are still overshadowed by shishi as raiders and anti-thugs. Basically I can't find any way to use them effectively. How about give them #onebattlespell "Storm"? It's very thematic and will make them actually different from other endgame summons.
Another choose is giving them Wrathful Skies and moving the spell to conj8, I personally perfer it to previous one because it's very cool for such an splendid creature
Edit: Ninjaed by Sajuuk.