Yes i had my impossible warrior with isharas whip and poison dagger, and had skell archer and sprites and like faires, also with night operations and sword of darkness in the night the damage was completly insane .. Even those insane houndres of lvl4 units and thousands of lower units on impossible were falling like flies, spirtes with crit could take down 100 bone dragons in one hit ;p ( actually that one could be with sword of light but hell who cares)
