Experienced this first hand about two weeks ago. I put a very tiny amount (touching a glass stirring stick to the side of the top) into my blend of Nagaland (Sulaym's Aqsa) with a couple of drops of ASO's Ward Ta'ifi and the cardamom absolutely went crazy and stayed that way for the first week and a half!
Today's it's a lot more balanced and it's bringing out the natural cardamom like cooling facets of this Nagaland oil, Ta'ifi has been relegated to the back but still adding a touch of elegance. I wanted to amp up the sweetness somehow, and I choose a very tiny amount, basically what was left in a bottle of Kangiiten's Kangii Attar, which is a very full rose-y scent but also quite sweet. The final product is very enjoyable, let's see how it holds up in a couple of weeks time but for today I couldn't be more pleased. I'm always searching for cooling scents with an underlying sweetness to them, and it's a great feeling to be able to make them, given it might only last for a day or two at these proportions 😂
Edit: Kangii Attar is apparently more Rose Absolute heavy. While rose essential oils can be citrus like, air-y, focusing on the herbal and green facets, the ability to add sweetness alongside florals notes means I can sweeten blends a lot easier with this material, I'm quite excited!
Has anyone who's blended or experienced mukhallats with cardamom noticed how on occasion they can feel "warmer" than the material otherwise would indicate?