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Enlightenment is easy enough. There's a Geomancy Procedure available for purchase for 1 exp at Occult 3. Allows you to enlighten a mortal over the course of a day. At E5, only a botch can screw up the ritual, since the difficulty is 5 - Essence.
Keep in mind, though: enlightening mortals en masse is risky. It puts all the power they need to cast sorcery, use any artifacts, and learn Terrestrial Styles in their hands, with no way to supervise it. Aegis-Inserts are convenient in that they're easy to produce (Alchemy Procedure for it, though countermagic destroy the product vs. making them as artifacts), limit their possible uses, and are easy to take away (see the mentioned countermagic).
Keep in mind, though: enlightening mortals en masse is risky. It puts all the power they need to cast sorcery, use any artifacts, and learn Terrestrial Styles in their hands, with no way to supervise it. Aegis-Inserts are convenient in that they're easy to produce (Alchemy Procedure for it, though countermagic destroy the product vs. making them as artifacts), limit their possible uses, and are easy to take away (see the mentioned countermagic).