Deities and other powerful epic beings normally have an "exp reserve," which is a collection of points they can spend on spells and item crafting as if they were experience points, though they have no effect on the entity's advancement.
As for how many exp in the reserve, I expect that would vary by Divine Rank in our case. Perhaps 1000 per rank or something similar?
Also, again just to be clear, the shift to Rules As Written means:
- We're dropping the class bonuses to BAB and saves, and using Epic Bonuses instead (at 24 hit dice, the epic bonuses are +2 BAB and +2 saves).
- We're losing the + Charisma mod luck bonus to saves.
- Fire damage resistance drops to 5.
- Damage Reduction changes to 10/epic.
Assuming this is accurate, I'll post the new stats for Sil up right away.