Existential Reckoning is the studio version of Live at Arcosanti. Live at Arcosanti comes with a DVD of the performance. If you like Existential Reckoning I highly recommend Money Shot and Conditions of My Parole. Money Shot is my personal favorite. It has "The Remedy" on it, just a great tune. As for Carina's solo work, Tigermending is an insane record if you can find it. Several of its tunes are on Deranged to Divine which is easily available. But, Tigermending is easily in my top 100 records of all time. Do not get Tigermixes. IMHO it is an abomination. Some things should be left alone.
One warning about Pucifer. The first album is "V is for Vagina" The album cover is going to offend some people. Maynard can be more than black. However my second favorite Pucifer song is on it, "Momma Sed." This is also the best version of it. Pucifer is a contraction of pussy and Lucifer. Maynard has since calmed down a bit. He lives in Arizona, has a vineyard and makes wine. The last bottle I had was terrible. They say he is getting better at it. When you hear Carina's arrangements you will understand the attraction to Maynard. One more thing. Maynard's and Carina's voices were made for each other like Jerry Cantrell and Layne Staley.