Equip yourself with dash and shell. Grab a bow and head north till you find the group of ice elementals. As long as you keep your distance they will let you pick them off for big myst rewards. If you are being pursued and feel that you can’t stand up to one in close combat simply dash away. If they block your dash by simultaneously using frostbite, turn on your shell and keep firing while moving away from the ice elemental. Keep turning to a new direction every six steps or so but don’t stop firing. You should be fine.