i have leveled the ice with 3/5 and it was ineffective so i choose curse instead, with the 15% for breaking armor and the 10% less damage to your troop, this with the turtle ( who gave you 10% +5% breaking armor with the active skill ) when youare with your team this a good spell add the light and the bosses are not happy at all ;o). for the mob i have the gale with the option for getting down for 2 seconds and the time who stop them playing with me D very effective !

they can be 10 mob my gale is power full and the time cut them and the curse can do a lot of thing when youare with a team ;o).