I've done a fair bit with Capella's and while you do have to go higher than some it isn't all that high. I do honeydew and pomagranite with Capella's that is 12% for the flavor and a drop of lemon and koolada at the tail end. Capella's is a good starter company because so many of the flavors do well stand alone. Capella use to be more expensive but recently they seem to have done a permant price cut. Direct from them it is 3.39 for 13ml (plus shipping). I also have cranberry but have not done a straight mix with it. I'll give it a try tonight at 12% and let you know how that goes. Flavorwest gets a bad rep around here sometimes and one of the things people knock it with is that it takes higher percentages. But by and large it seems most people are happy starting with 12.5% and most don't need to go over that by more than a percent or two. Some flavors yes but I'd absolutely start with the 12.5% and go up rather than trust fate and go high. People seem to love the TPA juicy peach and the suggested percentages for it vary from 5-17%. I would guess that the stand alone is closer to the 17.
Now looking at your goals-
For the blueberry pom with stivia I'd start with a small mix of perhaps 2 ml with just the flavoring at 12% and see how it tastes. If you find it too week then you know to add a couple of more percent. I suspect though it will be fairly close right off.
For the peach raspberry I'd start with 5% peach and 5% raspberry and see which one comes out on top in a small mix. You can alter percentages then to give more of one or the other as needed. I'd also wait to add sweetener till you see if it really lacks it and if so then add a percent or two.
The tea mix is likely the trickiest of your bunch because it will be a fairly complex flavor. I'd start out trying them all initaly in it at about 5% and do a very small mix of that. Put it in warm water soak and let it blend a bit before you try it because of the tea. See what is what with that and then adjust up and down on percentages to get the flavor your looking for. It also may need a drop or two of sweetener. I'm not sure what the sweetness levels will be on the orange of cranberry but I am sure the tea is unsweet.
I don't want this to sound more complex than it is because it won't be once you start in on it. In fact you have some really good and easy options with what your planning to order.
Now looking at your goals-
For the blueberry pom with stivia I'd start with a small mix of perhaps 2 ml with just the flavoring at 12% and see how it tastes. If you find it too week then you know to add a couple of more percent. I suspect though it will be fairly close right off.
For the peach raspberry I'd start with 5% peach and 5% raspberry and see which one comes out on top in a small mix. You can alter percentages then to give more of one or the other as needed. I'd also wait to add sweetener till you see if it really lacks it and if so then add a percent or two.
The tea mix is likely the trickiest of your bunch because it will be a fairly complex flavor. I'd start out trying them all initaly in it at about 5% and do a very small mix of that. Put it in warm water soak and let it blend a bit before you try it because of the tea. See what is what with that and then adjust up and down on percentages to get the flavor your looking for. It also may need a drop or two of sweetener. I'm not sure what the sweetness levels will be on the orange of cranberry but I am sure the tea is unsweet.
I don't want this to sound more complex than it is because it won't be once you start in on it. In fact you have some really good and easy options with what your planning to order.