Does anyone know the actual battle formulas? The videos I saw basically said the win loss is determined by life pool...health times defense times number of troops.

Attack calculates how many you kill if you lose the battle as well as your share of kills in group fights.

Does anyone actually know? How about the reducers? I have a feeling health and defense reducers actually increase your health and defense but attack reducers lower you oppenents attack. I am not sure how reducers could work in group fighting any other way.