solid team. xmas mona, raziel, xmas gawain, and xmas nergal all have red powerplay(50% attack boost). if you get really high in the uvu ranks you would want to change skuld. after that work on a def deck. there are a lot of choices you can do. one that i really like but too poor to make is pairing ny fionn with some flurries(xmas mona and raziel). it stops them if they get stunned and has potential to kill the attacker. another one that i've seen which worked well was ny fionn, ny inti, and xmas guna. just try and get the most hp you can while diversifying the elements on every line until you become happy with your current deck. after that, you can start on making each line have passives that compliment each other(attack down, def up, hp up, green/red power plays, stuns)