How do they train in Ossyria?
Unfortunately the number of monsters that are weak against ice are quite limited: fire boar, fire drake, fire bulldog. Firebulldogs are for level 90s, so you would be stuck at fighting without elemental advantages for a while. The new high level mobs in ludi have a few monsters weak against ice, but those maps are quite big to move around. Many I/L mages either stay at fire drakes until they are strong enough to go firebulls or train with priests and 1 hit kill zombies with magic compo.