Pluto in 11th House synastry relationships are based on a mutual desire to engage in organizational, scientific, humanitarian, and spiritual or religious activities.
In a positive scenario, the partnership acquires mysteriously friendly shades, which contributes not only to the strengthening of the relationship but also to more effective self-improvement of the partners. They are socially active, have many common friends and comrades, and are actively involved in large-scale social projects. The “Plutonian” personality tries to improve the plans and ideas of the Eleventh House person in a constructive way.
However, if the synastry is negative, this causes a sharp protest from the Eleventh House person while other disagreements (especially those related to power struggles) contribute to the overall destructiveness of the relationship.
from F. Sakoyan, L. Ecker
Pluto in 11th House Synastry Explained
Your friendship with a Pluto in 11th House synastry partner is unlikely to develop easily, although at first the manifestations of this aspect may be subtle, especially with a weak Pluto. However, the partner may suddenly show intransigence towards you, especially in connection with your friends or work in informal groups. The reasons for this attitude may be unclear: for example, he may hate one of your friends so much that you will not be able to continue interacting with that person.
Your Pluto in Eleventh House synastry partner’s intransigence may be inadequate, but it most likely contains a certain message that will show you the hidden flaws in your relationships with friends in general, as well as the defects in your actions in social groups. Of course, you can learn a lot if you get used to seeing a symbolic reflection of your own subpar subconscious programs in your partner’s behavior, but the learning curve can be steep and unpleasant.
Pluto in 11th House synastry partners may get the impression that they have the power to destroy any of your relationships with friends that they find disagreeable, but that’s not the case. The extent of your submission to this influence has strict limits, and if the partner tries to violate them the situation suddenly turns against them. Working on developing this synastry gives your friendship a lot of strength, but it is rather an evolutionary aspect that does not promote personal intimacy.
from A. Podvodny