I use
Injustice to set up
Preyscouter, but it's often is used on myself on turn 1 to ensure hitting power cards.
Ziat, Steelwarren Reeve carries hard. Not just because it's a good card, but it often causes the opponents to concede, especially when copied with
Living Reflection ...and I don't blame them.
This deck has trouble with fast Fire decks.
Ziat's Crackdown helps but sometimes it's too little too late. You may want to consider maindecking it.
Chillbringer doesn't really help, its effect doesn't come online soon enough and a 2/3 for 3 is not efficient enough statline to be a good blocker,
Murgo the Bone Guy and other 3+ Health 2-drops fare much better in that role.