Soul eater axe has 47ice + 10 physical damage. But monsters have an armor stat that absorbs a lot of physical. So it's possible that the physical part won't even scratch a mob, especially on a low stat like 10 points. Powerful frost adds + 5 ice damage (10,6 percent of whole ice damage on soul eater). Powerful crit gives an additional 5 percent (10 perc chance + 50 perc damage). While using powerful frost we still have a chance to blow crit 110 perc damage, and 160 perc still work on low blow. Wouldn't be more efficient to use frost instead of crit?