I will be honest, the reason I chose Manamune over Archangel's Staff is because I don't like what Archangel ultimately turns into. I think doing more damage, even if it is physical and not AP, is of better use than a shield. EZ has great range which is why in my opinion autos from enemies should be avoidable and he is mobile so just kite the skill shots. Of course everything is situational so if the game calls for it, by all means I will use Archangel's. It is just more likely I will go Manamune.