Re: Astromancy
Another question: how many Elements are you going to have? I see 3 (Fire, Wind, Spirit) listed. Are all the Elements known? If one (or more) Elements exist but are unknown to the astromancers of the world, then they are juggling unknown and hidden Elements when they do their thing ... which increases the hazard, perhaps drastically. That could be "lost lore" to be quested for.
FWIW, you could do a mock-up using the real sky (88 constellations) and impose, say, a cut-off of a certain apparent brightness for determining the number of capital-S stars in each. (That seems likely to give you lots of constellations with zero Stars, though.) Then you could assign the Elements to the stars via an arbitrary thing like spectral type. Given that you can get the basic data file for doing that mock-up easily, it depends on how hot you are for the programming task.
Then throw in jokers like variable stars (which sometimes contribute, sometimes don't), eclipsing binaries (where one Star has two Elements, except during an eclipse when one is blocked out), novae (rare, one-shot Stars with perhaps exotic or multiple elements), ....