Hi Ari, based on the information you gave me I can give you general statements about that composite signature, but in order to accurately and comprehensively understand a composite chart you must look at the two natal charts, the synnastry between both people, and then bring that understanding into the composite chart. The natal birth of each person, again, will give us a firm understanding of the core evolutionary dynamics/intentions for that individual, and we can then see how two people affect/impact one another through synnastry analysis. If, through synastry, person A has Venus square Pluto, or The SN conjunct a personal planet of the other person (Mars for example), then is going to dramatically condition how we read the composite chart. Is that clear?
In a general sense South Node in Scorpio would correlate to a couple who are trying to transmute past limitations within the relationship, and also to penetrate eachother psychologically. There are fears of abandonment, betrayal and loss that create an emotionally compulsive way of being together that creates a non-growth situation. The NN in Taurus would then reflect the evolutionary intention to develop a state of internalized emotional security and self-reliance within the relationship, and as a couple, to support this type of growth together. What is the Pluto/Venus phase in the composite chart? It was not clear in your post. These again, or very general statements I can make based on the information that you gave, and I would suggest reading the section in Pluto vol 2 called composite Pluto through the houses because it gives us a tremendous amount of insight into how to interpret a composite chart.
Thanks for posting.