I haven't worked with septiles, so I am not going to interpret that. I'm not taking that away from you, I just don't have the proper knowledge to use that aspect in interpretation. Same with biseptiles and quintiles.
Okay, I am first going to look at the impact your wife has on you. Let's start with her grand trine.
She has a Water grand trine with one planet (or combo) in each modality. She can easily plug into anyone's emotional patterning and then can decide the best way to work with those energies in the given moment. This can be very for you because there may be times that she seems to know exactly what your emotions are before you do and seems to be able to manipulate them without your knowledge to her best advantage.
The key here is
seems to be able to manipulate because it is not truly a form of manipulation, although you might read it like that with the amount of fire you have in your chart. What she is able to do is read the sitiuation emotionally and easily figure out what will be emotionally satisfying for both of you in that moment. Learn to trust that skill of hers and use it to benefit you both as individuals and as a couple.
Now let's look at her grand trine planets as they fall with in your houses.
Her Pisces Moon with 11th house coloring in your 1st house:
Part of her role in this relationship may be to help you connect into your personal unconscious emotionally so you can access what is hidden there, heal it and heal how you show yourself to the world. The Piscean energy also focuses on identifying and healing the way the collective unconscious has impacted your personal unconscious and personal conscious and how you interpret the collective conscious' impact on you. As you become more conscious of what is you (past lives, genetically, and current and future incarnations) and what is the collective (mythologically, historically, present and future), it gives you the ability to have more active emotional choices than reactive as you put forward more of who you actually are into yourself and into the world. Her Moon enables you to become more emotionally conscious overall and emotionally connected with your personal unconscious (Aquarius). Her Moon also pulls through the Aquarian energy at your ASC to the end of your 1st house because of her Moon's 11th house placement. Her Moon gives you the ability communicate to small groups at an emotional level about how to effectively contact all forms of consciousness and use the information they gather to heal and become more conscious. This is reinforced by your 11th house Mercury in Capricorn. You can take what you learn and share it with small groups in a down-to-earth way that doesn't sound totally, too-far-fetched "New Age-y."
This doesn't mean you could not do this on your own, it's just that her energy makes it so much easier to do it because it gives you the underlying emotional push to do it. Her Moon can nuture and nourish this outreach ability in you if you don't see it as a threat to you, which your Aquarian ASC might do. Aquarius, at its worst, thinks it knows everything and no one else knows and understands as much as it does. If anyone or any idea makes the Aquarian feel like it doesn't really know as much as it thinks it does, the Aquarian usually will rebel and withdraw from the person who is supporting the Aquarian.
Now her Moon is trined with your 9th house Scorpio Venus and your Scorpio Lunar NN and Sag MC conjunction. Now by yourself, Venus is too far out of orb to be a stellium with your conjunction for my orbs. When her Moon is brought into the picture, however, its trine with both brings them into a stellium.
Now my approach to Scorpio is that it is the threshold between the instinctual and full consciousness. It is both and it is neither. It is the twilight time, the time of metamorphosis. We learn to see the shades of grey through Scorpio, if we take the energy to the high end of its spectrum, as well as seeing colors more richly and understanding black and white more deeply. This is the willingly understandable depths of the soul, where as Pisces is more the unexplored, unfathomable depths of the soul that usually only trickle up through the unconscious providing us dreams. Cancer is the readily touchable, conscious manifestations of the soul and is instinctive. Scorpio is the crossroads between Cancer's instinctive emotional manifestation of the soul and Pisces totally conscious emotional manifestation of the soul. Scorpio is the alchemist that brings the two together to create the whole and take the whole beyond itself to other realms.
So your wife's Piscean Moon is trining your Lunar NN. Her contact to the emotional present (Lunar SN = Emotional Past, Moon = Emotional Present, Lunar NN = Emotional future) provides the transformational emotional process for your future. By allowing her to relate emotionally to you in the present, she assists you in your higher journeys and learnings into your depths of your soul in order to bring them forward into the now through your ASC. Her Moon can nourish and nurture the use of the teachings of the depths of the soul and teach those higher understanding to others.
(An aside before I forget this thought: I think you said this was your twentieth anniversary year with your wife. This means that your relationship is moving very quickly to its Saturn squaring itself. This particular square will be either a disseminating or last quarter square, depending upon whether it falls before or after the MC of the marital relationship chart, which in this case would be base upon your marriage date, time and location. If it is a disseminating square, it is preparing your relationship to really be under the microscope: how does the relationship function for you, how does it function for her, how does it function on its own merits, how does it function for the family unit? All these questions need to be explored in an open and honest way in order for the soul of the relationship to move forward. There may be a crisis precipitated by the relationship to get the two individuals to pay attention to the relationship on its own merits rather than their singular experiences of the relationship.
If the square is a last quarter one, the crisis will have already happened and you and your wife need to explore what the divide is between the evolutionary pasts of yourself, your wife, and the relationship and the evolutionary needs of all three for the future and see if you can map a journey that will be satisfying for all three. Everyone and every relationship needs to continue to grow in a healthy, mutually beneficial way for all considered or else it may be time to explore healthy ways of separating so the individuals can move on.)
Back to the topic at hand...
The Lunar NN is conjunct with your Sag MC, again emphasizing the bringing out of this higher knowledge into the public. Your wife could be a great support in this process because her grand trine energy intuitively knows what the particular "public" you are working with is the most interested in learning.
This aside does relate to the last paragraph: your wife's ASC squares your ASC. This can lead to issues of not seeing the other's contribution as being as worthwhile as one own. Both the Taurean and Aquarian energy can get very fixated on how it perceives the world and may want to go it alone and not share the glory. This energy is compounded by the fact that her Sun is exactly square your ASC. So you may not trust her as much as your Sag Sun thinks is possible to do. Her ASC/Sun opposition may challenge your ASC to think out side of the rational, intellectual box it has built for itself, and that energy may not want to venture outside of the place where it thinks it is the safest and warmest.
This is where you can allow your shared understanding of personal worth and value through relationship via the Venus connection (again, it is outside of orb for a conjunction in my normal limits, but her Pisces Moon allows the conjuction to take place) to trump the t-square because it harmonizes that normally conflictive energy and rebalances it to be reach beyond the blinders that both ASCs may want to wear on more than one occasion. Her Venus tightly conjuncts your Lunar NN, so her perceptions can enhance what your LNN is striving for.
Okay, I am going to leave this here for the moment and let you digest and come back with questions.
BTW, I am glad you are no longer beating your head against the wall. Now if we can only help you to stop feeling like Sisyphus, it will be nice.