Marincess or Unchained

Hey everyone just as the title states which of the two decks should I stick with? I know both decks aren't meta relevant or will be topping regionals but I would love to have either one as a casual deck. Also which of these decks would benefit from MR5?

I love the artwork for this deck but Marincess suffers from the lack of negates (frogs help alleviate this) but the deck is no Salamangreat. They also need Battle Ocean to remain a threat but a single mst can ruin it.

I've just started playing Unchained and I enjoy the playstyle of the deck. It's amazing that this deck isn't seeing much play despite the hilarity plays it can make. I also enjoy the artwork for this archetype as well.

As for the question to why not play both is due to the lack of free time I have to play.