What kind of powerful connection?

Aspects to Mercury also people to communicate. 
Jupiter aspects create generosity or forgiveness.
Pluto pulls you in as it repels you... etc.

Also, see this:

https://elsaelsa.com/astrology/what-are-the-best-aspects-in-synastry/

And this

https://elsaelsa.com/forum/relationships/true-love-aspects-in-synastry/

And this:

https://elsaelsa.com/forum/relationships/what-is-the-hardest-aspect-bond-in-synastry-to-break/

I meant a soulmate type connection.

Thanks for the links. They are very interesting.

My partner's Moon is conjunct my North Node, Chiron and IC.  From the moment we meet we both felt at home with each other. Also my Ascendant is conjunct his North Node.  Even when we tried to split up we feel pulled back together.

And if all these aspects happen to be double whammies ..... jackpot!!!

From my experience, Chiron synastry has been the deepest most impactful. Chiron - sun to be more specific.

Interesting.  Do you mean a conjunction between Sun and Chiron?  

I had Sun trine Chiron double whammy with an ex.  It was a significant relationship but he hurt me badly in the end.