Hello!
I played something like your deck at GP Pittsburgh this past weekend. I can tell you, while fun, it either wins straight out or leaves you sitting with trying to find a way to do 1-3 damage more before you are
dead. One of the cards I found after testing during Sunday Super Series is
Eerie Interlude.
Simple answer: Cast,
exile your critters when you have 1-2
Kalastria Healer on the field with a couple other Allies, and bang that extra needed damage is there. I held on to the
Eerie Interlude until I have a decent board state (2+ healers and 2-4 other critters), blocked what I could, and before damage, cast it. It caught people by surprise and saved my arse a couple times.
My latest ally deck is 4c. Testing it now... so far, so good. Once I get a week's worth of testing I will update it.
If you want to look at it
bkm capt crazy claws 4c ally