If you want Mysore Sandalwood to be front and centre of the composition, not as a supporting base note, it is easy to screw up a sandalwood composition as it is a very subtle, yet tenacious scent. I stick to vetiver and frankincense as supporting base note (and use lactone to extend the sandalwood), and very transparent middle and top notes, in very small quantities to support and extend the sandalwood. So my experiments have been with concentrate that are half or more of sandalwood!! This is assuming that
I did one very recently that I have got very good complements on ("wow what are you wearing. Smells EXPENSIVE"....honey it is, but less than that bottle of CK Be you have poured on yourself).
It is a play between Mysore Sandalwood (4m worth!!) vanilla and lactone base, nutmeg and cinnamon middle, and cardamom and saffron top with hints of holy basil. I added traces of ionone and utrazur to give a bit of zing, and lactone to extend the sandalwood milkiness, but otherwise mostly natural.
Down about half the bottle in 2 weeks, my wife and I love it so much. Perfectly delicious smelling, and perfectly unisex.
Try smelling mysore sandalwood soap from india to get some more ideas.
A classic mysore mix is sandalwood, vetiver and rose with oud to extend the base, and citrus to extend the top (sold to discerning tourists in Mysore perfume shops. Dont buy it there. Very poor quality ingredients. But sniff a sample to get an idea of the composition). You can try playing along with this. I dont like any natural citrus extracts with Sandalwood, but synthetic ones that "float" on top work better, esp if you extend the sandalwood milky note with lactone. I have also had good results by adding Terry Mugler Cologne, or Creed Vetiver to extend the top for this combination (I know it is cheating to mix commercial perfumes into DIY ones, but whatever works!). There is a milky citrus note in these compositions that I cannot isolate (can anyone help?), but is delicious and works best with sandalwood.