I feel the Purified Ashes/Priest/Cleansing combo is VERY underpowered.
The main reason is this:
In order to actually use it, 1.) Your opponent needs Undead in his deck (and in order to make it effective, it needs to be a LOT of Undead) 2.), you have to get 2 separate cards in your hand, 3.) Priest is a Durable common card that has no use unless you've played an effective Cleansing, so by inserting it into your deck, especially if your opponent has no Undead, you will very frequently have to discard Priest, wasting a turn.
All of these are the negatives. And for all that work, the only benefit you get is 3 bricks 2 gems, 2 recruits, also, you give your opponent a free discard (getting rid of a card that's useless to him, instead of making him discard it) AND, you don't get a new card the next turn, so even if you pull off an effective Priest, you'll still need to spend a turn to discard it after you've cleared out your opponents Purified Ashes.
Now, here are my fixes for this card combo:
For Cleansing, Add: "Your next card will be Priest" and make it Uncommon
For Priest, remove Durable, change the effect to "Discards all Purified Ashes from opponents hand, stock +2 for each card discarded in this way."
This may be a little powerful, but right now, it's COMPLETELY useless.