Zanpakuto as dream guide idea
I've never been able to find a dream guide, even calling on one, though I have been able to summon items with properties beyond the physical. Recently, I tried summoning a zanpakuto, or for those of you who don;t read Bleach, a spirit sword, containing a separate consciousness formed from one's own soul/personality. I focused on the tactile sense first, then visual, the inverse of what I usually do when trying to summon an item from outside myself. I was able to feel the sword really clearly, and then see details thereof with more clarity than I'd ever seen anything in a dream. I continued focusing on the sword, trying to communicate with it, see if I could possibly achieve shikai (release state, opened when one is able to communicate with the spirit of the sword). I got a name, a sort of verbal telekinesis only more so, and then the rest of the necessary information for the release was sort of just known, and then I saw a brief, clear view of more than just the idea of a glimpse of white fur. She (the being seemed female) was vaguely tiger-shaped, though I didn't keep focus for long enough and the shikai form collapsed, but I expect that if I can bring this back in a later dream (priobably including the inner-world bit), I might be able to get some answers about dreaming.
So. Yeah. Idea fir dram guides, for those who can't summon a person: summon an object or spirit link that comes with a being. See if that helps.