Ok first of all you can have any equipment and be any level and be on any difficulty for this. ok 1st you know were the building is were Nichales is being held well before that I think to the north is a easy battle with a guy that doesnt attack and cant die in 1 hit and you will get exp from him + money this takes time to get to max level though cause you get 1 exp each time you kill him.
Well I hope this was helpful byezzz.

P.S. If you have any question on this game send me a message with the Question ight.