Hello @AlfredGeist,
I absolutely love tinctures! They are like tea that can be stored for a long time - they are right there and ready to go whenever you want to use them. Very handy! 
I haven’t worked with blue lotus before, but mugwort is a great herb for dream and trance work. I use dandelion as a digestive aid, but it is tasty, especially when roasted! I bet it would serve you well as a tincture, too.
The tinctures I’m using now are mostly for health purposes, but I remember @Mistress_Of_Herbs shared a few blends for trance/astral travel/dreaming (note that some of these are edible, and others are not meant to be consumed). Here are a few of her lovely blends, in case you’re interested:
- Vivid dream tea
- 💫 Astral Travel & Astral Projection - #6 by Mistress_Of_Herbs
- Astral travel oil
- 💫 Astral Travel & Astral Projection - #30 by Mistress_Of_Herbs
I’m very interested in your tincture work - please keep us updated! I hope your crafting goes wonderfully 
Blessed be!