I think there's a misunderstanding underlying the concept of this deck. If you
flicker a creature, you
exile it and it returns face-up. But it's not "turned face up" this way, so the morph abilities don't trigger when you
flicker morph creatures. The only reasonable cause for flickering a morph creature would be if it's a very expensive creature mana-wise, this way you basically cheat it out for much lower cost. Something like
Krosan Cloudscraper,
Krosan Colossus,
Maelstrom Djinn,
Slipstream Serpent,
Titanic Bulvox,
Towering Baloth,
Venomspout Brackus, or
Woolly Loxodon in your colors. But I don't think it's worth it for any of those.
Sagu Mauler is not that bad of a creature, but it's six mana and you're in green, so there are easier ways to get this critter out before turn six.
Weathered Bodyguards might actually be a neat little trick.