Sideboard is put together to either increase flying creatures or life gain if needed.  I've also plugged some Evolving Wilds in there just in case.  My powerful stuff is in the deck, so the Sideboard is meant to augment where necessary.

The deck itself is built to put out and pump a ton of creature tokens to aggro the crap out of the other player's deck.  I added the Heliod god card because it's both a powerful creature and a way to get more tokens out late in the game.

The kicker, if I can hold off long enough and play it at the proper time is Devout Invocation.  That card can be devastating at the right time.  And the Crusader cards only get stronger as more creature tokens hit the battlefield.

All of that being said I was surprised by the price of the deck, though the Archangel of Thune was most of that cost.