Worker Ant, which somehow manages to get rid of their big, scary Maneater. Think of it as the three little pigs versus the big bad wolf-- in the end, the little pigs outsmart the wolf, and end up making him into a soup. Similarly, your "three little allies" use Eliminate Resistance as a smart means of getting rid of the big, bad, scary tank ally on your opponent's side.
Strong against: Quality decks (with strong allies in small amounts, usually depending more on actions and objects) and milling.
Weak against: ally-heavy decks where the loss of one ally won't really matter.