Far too much work and complication...
Much easier to just have them drop as normal just at a higher light level
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From a c.s. perspective, thia would be extremely simple to do. Hardest part would be the vendor(we've already seen them impliment a new vendor with new currency via tess), the drops would be a simple reworking of the look table, and the new light level would just be upping the light level of enemies.