Tager doesn't work for me, so I would strongly recommend you use Jin. I found every fight until Hakumen a cakewalk using nothing but Ice Car spam, (
). For the hard fights, Hakumen and Ragna, I used a combination of throwing Ice Swords when they're far away, Ice Car to ram my opponent when they're stunned (or fly overhead when they're dangerous), an occasional D to freeze them followed by rapidly hitting C to do some damage.
It is very likely you will lose multiple times in these fights, and losing two rounds here is game over, so it is vital that you bring a second controller with you and press
to save yourself from losing. Personally, I would restart any fight that I lost one round of, because the risk of having to win the next round or else start Score Attack from beginning was too high.