Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
Fascinating. I'm interested in how you designed the Orders of High Sorcery (or patrons). What determines if a mage receives a Staff, Tome, or Cloak?
I did not (for once) overthink it. Its funny how, when you create stuff from older classic setting, people love to have complex rules (just look at the thread on Darksun)

For the Gift, I just let the player choose, like the regular warlock pact.
Staff: Somewhat like Blade, but give extra attack at level 6 and attack with Int (the Mage is a Int-Based class).
Tome: Extra Cantrip and Ritual Caster.
Cloak: Receive a Cloak that gives a lesser version of the Ward feature of the PHB Abjurer that recharges on spell cast.
Some restricted Invocations are features ripped off PHB classes that did not appear in the setting (Staff could take the Minor Transposition of the Conjurer Wizard as an invocation, Tome can take the Spell Thief feature of the AA, as an example).
As for Moon Orders:
Solinari: UA Seeker warlock mostly
Lunitari: Somewhat like the knowledge cleric, but with some monk(!) feature such as the speak any language and perma-sanctuary.
Nuitari: Spell based version of the Oath of Treachery from Paladin UA