I think letting the EO's sit for a few days is definitely key with a complex blend like most chai's seem to be, I know mine have morphed a bit
Gotta say though, I can't make a blend without cardamom -- I have a very specific chai (tea) in mind when I work on it, and cardamom has a starring role. XD
That IS alarmingly expensive for cardamom, though! I've been through a handful of different suppliers, with one of them having 5 variants of the stuff, and I like New Directions Aromatics the best -- it's the most pricey of the ones I've tried, but it's still $123 for 3.3 oz. (and I don't buy it in that quantity right now!
) It's the one that smells most like the spice right out of the bottle, to me.
I used the cheaper Eden Botanicals cardamom in my chai soap blend, but I let the blend mix for 2 weeks before I soaped with it. The cardamom is really pungently medicinal straight out of the bottle, but mellows a bit in the blend over time.
Liberty Naturals' cardamom CO2s seem on par with Eden's, quality-wise. The steam distillations are less sharp, but not as smooth as NDA's.
I'm pretty sure I tried EOU's -- I know I got several things from them in my last order -- but if I did, I didn't like it much. ^^;