TFA Cheesecake DEFINITELY needs to steep, the flavor changes dramatically in 2 weeks from mix date
If testing plain, I like it at 10-12% (12% really), but the goodness doesn't arrive for 2 weeks so keep that in mind.
If mixing with a fruit, 8-10% might may be OK, but not sure? I know if I go under 12% by itself, tested 6-8%, I loose the buttery/cheesy goodness that appears after 2 weeks, so you may need to stay at 10-12% at least even if adding fruit.
Make two batches plain for testing. One at 12% by itself, and 1-2 batches and 8-10% by itself, then test after two weeks and see if you like that flavor of each, then decide where to go with the fruit based on the above test.
Good enhancers for this flavor, for me anyway when shooting for a plain cheesecake, have been TFA White Chocolate, and Lor Cream Cheese.
Also I should note, everything mentioned here is with my use of the the TFA Cheesecake Plain (No crust version), have not tested the other yet.