Divine Reversal looks really mana efficient for the Priestess. With both discount rings, you can prevent 2 damage, heal a creature for 2, and gain a life for 1 mana. I also see it as a good card to use if you want something akin to a Block that will work well against unavoidable attacks. Mostly I envision using it to support high armor creatures. Knights of Westlock particularly come to mind.
I really like the looks of Joined Strength. It's a way to make one of your creatures harder to take down, and forcing your opponent to spread out damage, rather than focus down one target at a time, is a good thing.
I already hate Minor Essence Drain.
Panther Stealth is so much cheaper than Mongoose Agility that I can see using it on lots of creatures that I wouldn't put Mongoose Agility on. The big target that comes to mind is a pet Thunderift Falcon. Put a Lion Savagery and a Panther Stealth on it and watch your opponent cry. Or just play a few Rajan's Furies so that they'll be easier to replace. That just seems like the perfect followup to a Cervere opening.
Rajah, Jungle's Talon is interesting. I think Rajah will be much better than Cervere for Lair builds, and Cervere will be a bit better for builds without a Lair. You COULD also do a cat build, but I still question the value of Makunda.
Badger Frenzy seems better in Arena than it does in Academy. The only creature I would really want to use it on in Academy is Razortusk, and I expect it to be a bit hard to get one out and keep it alive (and un-weakened). Besides Razortusk, your best attacks are 2 dice with piercing +1 or 2 dice and unavoidable, which is not that exciting. In Arena, you can use Badger Frenzy on Timber Wolves and Emerald Tegu, which you can spam out of a Lair.
I want to play 4 Rajan's Furies and then spam Steelclaw Cubs. I just think it would be fun.