TH is subjective and is not only based on PG. The flavorings used and the nicotine strength are often cited as additional factors in throat hit. With that said many people use 80/20 or even 70/30 mixes to increase vapor and moderate TH. Some even go 50/50, so again it is really up to how that particular
juice works for you in your atty. When you say 10 ml are you talking about the size of the bottle or are you saying it is 10Mg strength? Be aware that diluting your
juice will dilute the nicotine strength as well as the flavor.
Edit: if you have an empty, clean bottle you could try diluting some of the liquid and do a taste test to see how much you can dilute it without going "too far" I'd try 90/10 then 80/20, 70/30 till i found what was vapeable.