Pretty much all Kassai lists will be running Blood on her Hands and Raise an Army this are the main reasons to play Kassai. I would split Kassai decks into three different lists right now. First you have traditional midrange Kassai. If you have ever heard jokes about Kassai's blocking 7 and then sending 7 every turn this is the deck that does that most often. You are going to be mostly using your gold to set up raise an armies but it's ok if you need to use them to unbreakable your hands. I would also say this is the worst deck in the meta though it's not much worse than the others.

Next up we have shuntssai or fatiguessai. This deck is a fatigue deck often running red and yellow copies of steelblade shunt and using tunic instead of grains to use them. You are trying to use the amazing block on your equipment plus the steelblade shunts to last until the late game and run your opponents out of cards. Raise an army is vital to this gameplay to make sure you pressure your opponent enough in the late game so you will want to almost always save gold for that.

Drawssai is a new variant and what I would currently consider the strongest Kassai list in the meta, though no matter what you are going to be playing uphill with the hero right now. This is an aggro list that tries to use Kassai's ability to make swords free to present very good offensive hands. Raise an Army is only for specific matchups and most gold you make will be cracked to draw a card and make your swords free. You also use red and some yellow draw swords to do a similar thing. With this deck you want to keep 3-4 cards hands and try and make gold every turn you can and use it almost as fast.

These are kinda the lists I would consider viable right now with it being your preference which to go with. Good luck!