Mulligan

Try to get low-cost creatures (2-4 Magicka) since your rather weak early game. But don’t keep Sharpshooter Scout. He’s less useful in this stage of the game.

Playstyle:

This deck plays like almost any other control deck, meaning you play reactively and try to answer to your opponent’s moves.

With Little Girl, Night Shadow and Night Talon Lord you have 9 healing cards which is about enough to keep you afloat health-wise.
Little Girl is weak when played at first, so play it wisely. It also can be used to draw out a removal.
Remember that you can combo all heal creatures with Unstoppable Rage to heal a ton of health.

Don’t play your Doomcrag Vampire prematurely if you can’t kill anything with it yet. Try to use him in a combo or to buff a creature already on the board to remove a high-profile target.

Don’t try to conserve your pings for the combos. If there’s an opportunity to get an advantage or stabilize the board with them, go for it.

Combos:

Cicero / LaChance / Venomtoungue + Quicksilver Crossbow

Any heal creature + Unstoppable Rage

Turn 9:
Any creature + Dagger + Unstoppable Rage

Turn 11:
Venomtongue + Unstoppable Rage

Turn 6:
Your earliest combo you can pull of with Doomcrag.
Doomcrag + Nord Firebrand

Turn 9:
Doomcrag + Quicksilver Crossbow

Turn 10:
Doomcrag + Earthbone Spinner

Last but not least:
Doomcrag + Ohdaviing

GL&HF

Edit: cut out Skaven Pyromancer and Haunting Spirit to add more guards and make early game more consistent while adding Ohdaviing and more Night Talon Lords for board clear and late game heal.