not so sure, but i just played this a few days ago and i think your levels should be alright.

this is good advice, there should be a spear you can purchase at that time (at bur-omisace) that has thunder elemental. give this on one character and you'll take out the ice elementals VERY easily. as for mateus i wouldn't say it needs much other than the regular gambits, attack, cura at a certain percent, you know the drilllie.