hahaha this ruined one of my deathless streaks yesterday. I mean just look at this nonsense. What's really screwed up is I would have won, Ike would have lived with 1hp while baiting Cecilia on the first turn had I been using fortify res on Azura instead of fortify def.
http://i39.photobucket.com/albums/e157/Nothing371/IMG_3315_zpsnjyi0rr6.png
http://i39.photobucket.com/albums/e157/Nothing371/IMG_3314_zps8pfe9tdf.png
http://i39.photobucket.com/albums/e157/Nothing371/IMG_3316_zpsc4aloajd.png
http://i39.photobucket.com/albums/e157/Nothing371/IMG_3317_zpsjisnwy83.png
That is the team I am trying to build too. I want to get an Elise now more than anything. I just don't have a +Atk Cecilia right now is the only problem. I plan to leave raven tome on her as well because we're going to have to roll with a bonus unit every week.
I actually used exactly the same team for arena (and defense) this week! Not the same builds though, Triangle Adept Xander seems really suboptimal to me, especially on defense.
Also, I would advise against trying to bait a fully buffed Cecilia on the first turn with a low Res non-TA unit.