I played a Rogue Deathrattle deck because I have a Rogue/Warrior 5-win quest right now, and I won the first match against some Murloc Paladin. Rogue is actually quite nice against anyone that chooses murloc since you can just kill their spawned murloc over the course of two turns for 2 mana. I think the weakest card in my deck is probably Lil' Exorcist. I went for it mostly because if I play against a Deathrattle deck, it'll be
ridiculous, but if I'm mostly going up against Murlocs and such, maybe I should go with Hungry Crab?
EDIT:
Hah... so as soon as I remove the Lil' Exorcist, I go up against a fellow Deathrattle Rogue.
EDIT 2:
I still beat that Deathrattle Rogue, so no biggie. I also went up against an interesting one... a Spell Rogue that focused on trying to mill me. Although, given my deck consists of cards between 1-6, trying to mill me doesn't work all that well. I ended up crushing him too. I also fought a Spell Warlock, and probably the
hardest part of that battle was trying to guess when he'd use Twisting Nether to clear my ginormous board. (He never did.)
Also, since someone may be curious, this buff will boost all entities with an existing Deathrattle
not if they have one by default. So, when I was building my deck, I wasn't sure if the Raptor card's Battlecry (grants it a friendly minion's Deathrattle) would work, but it does. So, if you want to play a Druid, the Soul of the Forest (gives all minions a Deathrattle to summon a 2/2 treant) will also work.