If your Ratcatcher does not survive the turn cycle, you essentially spent six mana to get a removal spell out of your opponents hand, putting both players behind of the rest of the table
I reviewed my assembled collection, and decided that my most competitive option, under the strict parameters of League rules , was Blue-Black
That being said, a deck that plays a lot of double strike creatures is going to want to play a fair number of pump spells anyways
Heliod, Sun-Crowned can step in for Archangel of Thune, putting a +1/+1 counter on target creature or enchantment whenever I gain life
Of the 2-ink cards, we actually think Friend Owl Cantankerous Neighbor is the best
(I skipped Onslaught .) And Mirrodin