Re: combat multiplyer
open FE and go to CREATURE open it and find CREATURE_HERO double click on it and a window will open then click on the + sign next to CREATURE then click CDefs and then find CCreatureStatsDef and then click on "Links to (GameBINEnum)" which is at the bottom of CCreatuerStatsDef.
Then click on the + sign near CCreatuerStatsDef and find 129763F0-unkown and click on it ( not the + sign ) and then look on the right you will see a number 1 change it to any number you want ( the higher the number the more dmg and the combat multiplyer will increase) but ye you cind of cheat since you will do a 1 hit kill when you put it to 100 or so.
BTW: don't forget to click on apply changes and save it.