Get Dakki and Hajun/Yuki-Musume out on the field and Synchro until you can't anymore, then Link into Yuki-onna (L2).
If you have Yasha in your hand you can then SS them to Link to the bigger Yuki (L4) with Dakki, Yuki, and Yasha.
REZD is moreso just filler and a card I've used in every Zombie deck since it came out, so you don't have to use them.
Vampire Fraulein is a good defensive option and can make going into L4 Yuki-onna easier if Yasha isn't available.
Doesn't really have answers to everything, but that's why it's a casual deck.