But why not change the title to Phoenix now, if you don't like Xerarch?
It's funny you should mention that. That one time Xavax captured Ibladesh, Selenia was so pleased she instituted an honor-title tradition where if a member of the ruling council does something sufficiently awesome, their title gets updated from standard as a testament to their greatness. That's how our general went from the initial 'Strategos' title to the Honorary 'Talon'. Basically General Kinsey to Great General Kinsey.
One of our nobles already started a referendum to award Selenia the title of Phoenix Queen