mk for one thing:
you have to look at the long term
POD is a staple in most, if not all, decks this format.
your deck doesn't special that much, so it's good.
Second:
Horn is AMAZING in your deck.
It gives you long-term +800 with rhino, and that will bump him up to 24-2800 attack power, which can get over almost everything you play against.