Boss should really not be able to throw soldier or boss away, or the should stop more time due to it. It is like we cannot hit them, boss throw soldiers, they climb, they make one hit, they are thrown away, they climb ... Even the easy mode is taking me time to acheive (I have end sketching all the path of all waves to have more efficient planning). Have you heard about difficulties balance ? We are here for good time, remember it ! no problem to put nighmare mode, but easy should be easy ...