Just the general range I’ve found useful for each.
If you were to test them as a duo, I’d start at
RFSC Peach 1.25%
MF Wh. Peach 0.5%
This leaves some head room to bump 'em up if needed, but should be generally vivid enough for the wow-factor.
You can find the RFSC anywhere that caries RF.
MF, if your in the US, I use Good Earth Beauty. Use code GEB10 for 10% off and they always have free domestic shipping. Make sure to ask for a free sample of another MF flavor, too. They’re good about that.
Edit: Steep at least 3 days to test, they are good to go fairly early in the steep, but really shine at 4 weeks.