I was playing on Classic and still am and I'm definitely not finding it easy.... I used Summoning but no Polymorphing and I'm about to finish the story. I never found one battle to be easy, really. Maybe because I was using geomancer and necromancer skills which most skeletons are immune to but I also used pyromancer, aerotheurge, hydrosophist, warfare and huntsman skills (2 per character). That's what I feel at the moment.