There are some differences between a 5 and an 8, so knowing where to start can depend on your approach.
While all women are somewhat attracted to similar traits, they do not all value these things equally. 5's are easier to approach and open, but they are typically accustomed to being used for sex, so it is not unusual for them to place a higher priority on screening men for commitment, romance, etc., sometimes even withholding sex in the process. The more "DJ" you are, the more likely you'll get more sexual resistance/hesitation. Women like this will normally screen for men who appreciate the woman's own value. They more typically desire a man who values THEM.
An 8, on the other hand, might be more difficult to crack right up front, but once they buy in sex comes relatively quick and easy. Women like this screen for men who have higher value.
The point here is, if you start off with 5's, the initial and primary focus for them will be on you justifying their value. When you're dealing with 8's and so forth, their focus will shift to a justification of your value, which indirectly justifies their own.
In a nutshell, what might work on an 8 will not typically work equally as well with a 5 and vice versa. It's not the same game.