Is there a correct damage formula?

Day 1,366, 05:34 Published in Hungary Belarus by PanJaugien

I want to know how many hits I need to kill an enemy, but unfortunately i couldn't find any formula which could help me.

The following formula is on the erep wiki but it isn't correct:
D = (60 + ((S1-S2)/10)) × (1 + (Your FirePower-Enemys FirePower)/400) / 2

[img]http://wiki.erepublik.com/index.php/Military_formulas[/img]

I tried something to correct on this formula and it is much closer to the reality but it still isn't the one erep uses.

damage = (80 + ((MyStrength - OpponentStrength) / 9)) * (1 + (myFirePower - OpponentFirePower) / 400) / 2;

Do you know a correct damage formula?

Pufi