So I was creating a sort of warlock/priest type play style and wanted to use a defensive ult. Since I am going more healer I chose Soul Siphon which is a great burst heal for a group when needed.
But then i realized later on while I was alone that the ult doesnt heal me. Why not? You complete sacrifice 100% of the damage and the ability to CC for a burst heal that doesnt even work for yourself.
Now if I am solo this is literally a wasted ult on my bar, which makes me sad because there isnt a replacement for it, every other ult I have access to is Offensive with the exception of Consuming Darkness which cost more and provides less of a benefit as a healer.