The Battle Simulator will not be 100% correct, there are different variables in a real battle which would change the result - the unit's health, and its experience.
at the battle simulater also shows when putting the other guys units with HP1 that with sending just one unit all of his die? Is that correct to be?
1HP units are extremely easy to kill, although you might not kill all of them in the first round, they will not last long.
Also, I recommend you check out our Adopt A Newb Center
. You can get your own mentor if you'd like to.