I only did frost mage after having played it for about a 3 months or so :P ill most likely play the other classes down the line I figured id do it when I knew a bit more about the classes and stuff
Look for eternal storm set for the equipment set stats also, also this is just a suggestion, just stack senhime, vanas, blackcat, amaterasu, i dunno whether tales of wind have shining cards, but in laplace, those 4 are basically then end cards for dmg dealers
Try to go for metal guard, stack 4 of them later on you will be able to upgrade to red metal guard and that card is a must for dps, for frost best build should be 4 fardis (8% dmg debuff each) 4 dexter (2% attack each) 4x red metal guard (1% attack each) and either Luna, Black Cat or Senhime another nice addition would be Vanas as ignore def