A truly great, modern house!
I find the mahority of the offerings by ELd'O to be really complex/complete already and quite often redolent of leather, a tough note to layer with. Perhaps Anti-Héroes and Jasmine et Cigarette would layer well, as they are both rather simple. Something I can't imagine is wanting to add the bilge note from Secretions to anything - if you mixed it with Erolfa you would more than likely recreate the smell of a whaling ship that's been out to sea for a month. I've come around to Secretions and am considering buying a decant - the problem I still have with it is that it has such atomic longevity. BTW, my favorite from the house is Vierges et Toreros.