Hi... I read your post here and decided to give you a basic summary of what I think can help you.
For you to play probably how you want it is what many have sought to get where they are.
These are some "simple" details. The biggest one:
1. Hunt good weapons. Like for example, see what weapons people tend to use in a Racast.
2. Recognize the "quest" well. Know which monsters will appear and where.
3. Know which CORRECT weapon to use on that monster.
(For example: You will not use a "bazooka" to kill a monster that looks like a small bee.
Because most of the time bazookas were made for "area damage"
Like for example: hitting many monsters together or bosses
that have more than 1 single part for you to get right)