Yeah, if you have a maxed athletic skill and I think your sim is either brave or adventurous, they will always win a fight. If your sim leaps onto the enemy, they're going to win. The easiest way, at least with a sim that I got cursed without cheats is to make sure they have a low athletic skill, no martial arts skill, haven't got the brave trait. The sim that got cursed (for me this was ages ago) was one of the first sims I sent adventuring after getting WA. Since then I've determined how to ensure my sim wins all fights against mummies because I didn't like the curse and the soul peace stones are worth a fortune so, money!
