Just hit legend with this deck. Maybe this could help you guys climb higher on ladder as well! Mukla and leeroy can easily replaced by sea giants. If you don't have other cards, don't craft them because devine favor goes to hall of fame next rotation. Good luck!
EDIT: the new auto complete feature is great for people who don’t have all the cards. Just make new deck, add call to arms and press the button “complete the deck”. It will give you the highest win rate deck with the cards that you own.
Also check out Tommy Wave's video: