With dream journals, the more the better. it's okay to write sentences and then write them up fully, but just doing just a sentence seems to damage the vividness of recall, which kind of defeat the point.

B6 can be nice, but it's really quite pointless, just stick with what you're doing until you get an LD. You seem to be quite good anyway, B6 should really be used I think, for people in a rutt.