It's pretty srtong, but if you want a really broken Deck, you don't want to let those minions survive that long, or I can explain it like this:
If so many minions survived, they caused lots of damage to you, which means that your Deck is pretty weak.
If there's just 1 or 2 minions, you can use cheper cards like
Gondor's Vengeance, which is a really versatile cards btw. You can use it also in Elven Decks with
Arwen, DoE.