Ascendant in Taurus means that the Scorpio is on your Descendant, the seventh house, and that you seek in partnership qualities represented by Scorpio. Some of these qualities are great focus, productiveness, and reliability. Venus in Pisces is harmonious with Scorpio and helps you guys feel like one, even though you always somehow surprise each other, emotionally. However, there are many aspects involved in determining what can present challenges in a relationship. You certainly seek for an emotional experience that will broaden your perspectives, but Aquarius and Scorpio need a test of time to see if their energies are really compatible. They are both Fixed sign, meaning they know what they want pretty much all the time, and compromising is sometimes hard. You should definitely do a compatibility chart at http://astro.cafeastrology.com/cgi-bin/astro/comp2f and you are welcome to come back with some more questions, like what are the challenging areas?