First, Sorry for the various questions, it is the first time I play maplestory and I have several doubts. Which of these do you think is best for boss and mob? Is it better to be pure or normal build? why ? in both Is it required to wash both? I do not think of doing too much work and spending too much Without wash I could kill monsters and boss? Is Hunter better normal build or pure? Is assassin the best normal build or pure? Again, I'm sorry for the various doubts and topics, is why I do not understand this and I have serious doubts about wash in these two classes because they are my favorites and I do not know how to do
For any class, the general rule is go 'pure'. so for hunters, full dex, for assassins, full luk. (Apart from the 25 dex needed to advance). Hunters are by far superior at mobbing, assassins win at bossing if they have se. Also, hp washing is advisable to do with both classes, it just makes bossing easier and you don't need hb for it.
If this is your first time in Royals, i would suggest building a bishop for funding first. Sorry if this answer sounds too mainstream/boring, but that is one of the easiest ways starting your royals life Edit: If you don't plan to hp wash, you can disregard the above