I'm going to give the "best" advice. Throw the disc that gets you the best scores.
This, of course, is simply stating the obvious, but the obvious is sometimes not so obvious. What kind of lines are available? Which of those lines can you throw successfully more often? Can you creatively use a disc that gives you an even better percentage?
An example: on the course I play most often, there are three holes in a row that all list at about 190. One is a left to right turnover that rises and then falls, so plays approximately flat. The next is uphill and has a diamond of trees between you and the basket. You can play a flex to either side to park the hole, but the right gap is skinnier. The third is uphill and a left to right turnover.
I'm throwing an easy putter turnover with beat in neutral flying putter on holes 1 and 3. On hole 2, I play an extremely overstable fairway driver on a flex forehand. That's the easiest shot shape that is the least risky and is capable of parking the hole. I could throw a straight putter to about 25 left of the basket, but that's never going to park the hole and the miss on that shot is much more likely to result in bogey.
Basically, all I'm saying is think about what you can do to score your best most consistently.